OLED Burn-In Test and Per-Model Notes

OLED Burn-In Test - How to Check Your OLED Monitor

The OLED burn-in test is a retention check, so it should be run after the panel has seen normal use. OLED burn-in occurs when static elements displayed for extended periods cause uneven degradation of the organic emitter material in individual pixels, leaving a ghost image visible on other content. RTINGS found that long periods of static content cause OLED burn-in through cumulative subpixel degradation, while LG says extreme usage can create retention that mitigation features may reduce but not make impossible.¹ Modern OLED displays often include retention-prevention features, but they reduce risk rather than eliminate it; short-term retention can sometimes improve after a panel cleaning cycle.²

What the grey test reveals and why

Solid grey is a useful background for detecting image retention and early burn-in on an OLED panel because RTINGS records 50% grey, red, green, blue, cyan, magenta, and yellow photos during its burn-in test, and grey fields make luminance differences easier to compare across the screen.¹ On a mid-grey pattern, a retained ghost appears as a slightly lighter or darker region shaped like the static element that caused it, typically a taskbar, game HUD, or browser bar.

Why grey exposes retention first

The test works because retained emitter degradation produces slightly different brightness output from affected pixels compared to unaffected ones. On dynamic content, this difference blends into normal image variation and goes unnoticed. On a uniform grey field, the luminance difference stands out as a visible region. Run the grey pattern long enough to notice faint regions; if you suspect retention, compare the result before and after a cleaning cycle rather than judging from one quick glance.

If a faint region appears on the grey test but disappears when you switch to a dynamic content window, the retention is still mild and likely reversible with a panel cleaning cycle. A ghost that persists across multiple content types and remains visible on the grey pattern after extended use is the finding that warrants systematic documentation and potentially a warranty discussion.

How to interpret a faint ghost image

How to interpret a faint ghost image

A faint ghost visible on the grey test pattern does not automatically mean permanent burn-in, and proper diagnosis requires a systematic approach rather than a single alarming observation. First document exactly what static content was displayed on screen before the test and how long it remained visible without changing, then run the monitor's recommended pixel refresh cycle or allow an extended rest period before retesting under identical conditions. If the ghost visibly weakens or disappears after the refresh cycle or rest period, you were observing temporary image retention rather than permanent organic material degradation. If the ghost remains clearly visible in the exact same screen location after multiple checks separated by adequate rest periods, document it thoroughly as a persistent retention image that may warrant a warranty claim.

Always use the identical brightness setting and room lighting conditions for each retest, because changing the brightness can make a faint ghost appear to improve or worsen without any actual change in the panel's physical condition. A reproducible result documented under consistent, recorded conditions is significantly more useful for warranty discussions than a single alarming photo taken immediately after a long static-content session when retention is expected to be at its most visible.

Running the panel self-cleaning cycle after testing

If you detect early retention, run the panel's built-in pixel refresh or self-cleaning cycle before pursuing any return or warranty claim. Many OLED gaming monitors include this feature in the OSD menu under names such as Pixel Cleaning, Pixel Refresh, Panel Care, or Self-Clean. ASUS says Pixel Cleaning calibrates issues that may arise after long use, takes about six minutes, and is recommended every four hours.³ Corsair describes five-minute pixel refresh cycles after shutdown.⁴

What pixel refresh can and cannot fix

Retention that developed recently, particularly from short sessions with static content, is the most likely to respond to a cleaning cycle. ASUS says residual image or burn-in conditions may return to normal after the screen is off for at least one hour, or after repeated pixel cleaning if the issue remains.³ Retention that developed over months of heavy static use is harder to reduce and may not respond significantly to a single cycle.

OLED care settings to configure after testing

After establishing a retention baseline, configure the monitor's OLED protection features to slow future degradation. Corsair describes OLED burn-in prevention technologies, including pixel refresh, on its Xeneon Flex monitor, so use your model's equivalent pixel-refresh or pixel-shift setting when available.⁴ Those compensation routines are short by design: they detect and reset changes in the panel's thin-film transistor layer and usually finish in under ten minutes, which is why running one after the grey test costs little time.⁵ Set a screen timeout so the panel dims or sleeps instead of leaving a static image on screen indefinitely.

Configuring brightness and gaming-use protection

For gaming use, lower peak brightness to the minimum comfortable level for your room. LG says most burn-in cases come from static on-screen elements displayed uninterrupted for many hours or days at peak brightness, so reducing brightness lowers one of the main risk factors.² Use the grey test pattern in this tool as a periodic benchmark: run it every few months to track whether retention is developing in specific regions before it becomes visible on normal content.

When to use this

Run this test periodically after months of regular use, using the same grey field pattern from this periodic OLED retention benchmark that covers every OLED display you own, particularly if you display static content like a taskbar, game HUD, or browser chrome for long sessions. Also run it when buying a used OLED monitor to assess how much retention has already developed before purchase.

Examples

Ghost of the Windows taskbar faintly visible at the bottom of the screen during normal use

Solid grey test pattern from CapyToolkit confirms the ghost is visible at all content positions

Faint outline of a health bar or minimap visible on the grey test pattern

Ghost confirmed as static to the panel; early retention, not image persistence

Alienware AW2725D Monitor Test

With the Alienware AW2725D, OLED response changes the testing order because motion clarity, retention, and pixel health matter more than LCD-style overdrive. The Alienware AW2725D is a 27-inch 1440p 280 Hz QD-OLED gaming monitor. Its OLED panel responds much faster than LCD panels, so the most useful checks are motion clarity, image retention, burn-in history, and pixel defects rather than LCD-style overdrive tuning. Use the response patterns to compare your settings, then run the full black, grey, and solid colour patterns to document the panel you actually received.¹

Specifications¹

Motion clarity and OLED response at 280 Hz

The AW2725D pairs 1440p resolution with a 280 Hz refresh rate, so each frame has about 3.57 ms to appear before the next refresh. That short interval makes motion clarity easier to judge than on a 60 Hz panel, but it also makes setting mistakes more obvious. Use the response patterns at your intended refresh rate and compare the leading and trailing edges of moving elements against dark and light backgrounds.

Because the AW2725D is QD-OLED, its pixel response is already extremely fast. Tom's Hardware notes that OLED panels generally do not need overdrive and are smoother at a given refresh rate than comparable LCD panels.² If your OSD exposes overdrive-style options, treat them as candidates to test rather than settings to maximize. A cleaner image with no bright overshoot is better than a technically aggressive mode that adds visible artefacts.

Choosing the cleanest motion setting

Run the same pattern at Default, Fast, and any Extreme or aggressive setting available on your unit. Look for pale bright fringes before moving objects, dark trailing smears behind them, and any shimmer around high-contrast edges. If an aggressive mode changes the image but does not make the motion look cleaner, return to the smoother setting and keep it for everyday gaming.

How to keep OLED results reproducible

How to keep OLED results reproducible

OLED checks are only useful if the conditions are repeatable. Record whether HDR was on, whether the monitor had just shown static content, and whether you ran the panel health routine before retesting. A ghost that appears after a long HUD-heavy session is not the same as a dark pixel that remains on every pattern. The first may be retention; the second is a panel defect.

Use the black, grey, and solid colour patterns together for the most complete assessment. Black exposes bright anomalies and uneven luminance across the panel surface. Grey exposes tint shifts and subtle mura that black fields can hide. Solid colours expose failed subpixels that only appear against specific backgrounds. Combining those notes gives a clearer picture than judging one pattern in isolation.

QD-OLED black level, uniformity, and image retention checks

OLED pixels can turn off individually, so the full black pattern is useful for checking for stuck bright pixels, panel tint, and uneven luminance across the 27-inch surface. Unlike IPS glow, OLED black is not caused by a backlight, so corner haze that changes with viewing angle is not the main issue. Focus instead on whether any region stays brighter than the surrounding black field or whether a bright object leaves a temporary ghost after the pattern changes.

Separating OLED mura from retention

Run the mid-grey pattern after the black test. Grey reveals tint shifts, slight mura, and panel-level uniformity differences that pure black can hide. Scroll or pan slowly if your test pattern supports it; a fixed patch points to the panel, while a moving artefact usually points to signal, scaling, or content. For OLED panels, temporary image retention is a realistic check after long sessions with static HUDs, browser tabs, or taskbars.

Dell's panel health guidance for Alienware OLED monitors tells you to perform Pixel Refresh when the indicator is yellow and Panel Refresh when it is red.³ If a faint ghost appears after a static-heavy session, document the pattern, run the recommended refresh routine when appropriate, and retest before deciding whether the issue persists.

Burn-in risk, pixel policy, and warranty documentation

QD-OLED panels need a different warranty baseline than LCD panels, and the emissive layer behind them is the reason: each OLED pixel emits its own light, so degradation shows up as subpixels wearing out unevenly rather than as a backlight dimming.⁴ Image retention and burn-in are not the same defect: retention fades once the static image disappears, while burn-in is permanent uneven wear of the subpixels that static content leaves behind.⁵ Dell states that QD-OLED panel technology is limited to a 3-year maximum warranty term and includes burn-in coverage. That does not mean every temporary ghost is a warranty failure, but it does mean you should keep clear records if a persistent image remains after normal use and refresh routines.

Documenting defects for a Dell OLED warranty claim

Dell's Premium Panel Exchange covers eligible Alienware monitors with zero bright pixels or bright subpixels during the warranty period, while Dell's broader monitor policy allows some dark subpixels under its pixel policy table. Count defects on the relevant solid colour patterns, photograph them at normal viewing distance, and compare the count with Dell's current policy before opening a case. The strongest claim combines this OLED defect warranty photo set together rather than judging any single pattern in isolation, and is specific: pattern used, defect location, count, date, and whether the issue remained after cleaning the screen and changing inputs.

Alienware AW2725DF Monitor Test

Start AW2725DF checks with subpixel layout, because defects and text fringing do not look like LCD pixel issues. The Alienware AW2725DF is a 27" QD-OLED gaming monitor running at 360 Hz with VESA DisplayHDR True Black 400 support.¹ QD-OLED combines self-emissive OLED pixels with Quantum Dot technology, so it produces deep blacks without backlight-based IPS glow.² Use this tool to check for subpixel anomalies, uniformity, and response behaviour.

Specifications¹

QD-OLED subpixel structure and pixel test interpretation

QD-OLED panels use a triangular subpixel layout rather than the standard RGB stripe arrangement.³ Each pixel cell contains three subpixels arranged in a triangle, with red, green, and blue at different spatial positions rather than in a horizontal row. This layout produces excellent colour volume, but it changes how pixel defects appear during testing.

Reading QD-OLED subpixel defects

A failed subpixel on a QD-OLED looks different from a failed subpixel on an RGB stripe LCD. On a solid green pattern, a failed red subpixel appears as a tiny cyan or blue-green fringe at a specific position within a pixel cell rather than as a pure red dot. When running the dead pixel sweep on the AW2725DF, inspect each pattern for small coloured fringes or irregular coloured specks in addition to solid-colour dots.

At 360 Hz, each frame lasts 2.78 ms, so the AW2725DF's QD-OLED pixels need to transition well inside that window to avoid visible trailing artefacts.⁴ The solid white pattern is the most diagnostic for OLED defects overall. Any dark spot on a uniform white field indicates a non-emitting OLED element and qualifies for warranty assessment under Dell's Premium Panel Exchange.

How to document OLED-specific results

Documenting OLED panel defects correctly requires a fundamentally different approach than LCD documentation, because OLED-specific phenomena like temporary image retention and automatic brightness limiter behaviour can easily be mistaken for permanent hardware defects if the test conditions are not carefully controlled and recorded. Temporary retention can fade after a rest period or a pixel refresh cycle, while a true dead subpixel persists across every test pattern, so recording the test sequence and the time spent on each pattern helps support staff distinguish between the two failure modes. ### How to document OLED-specific results

OLED results require substantially more context than LCD results because temporary retention, ABL behaviour, and VRR-related brightness changes can all mimic permanent panel defects when the test conditions are not carefully controlled and recorded. Note whether HDR was enabled at the time of testing, whether the test pattern ran in SDR or HDR mode, and whether the monitor had just displayed a static taskbar, browser bar, or game HUD for an extended period before the check. If a faint ghost image appears on the grey or black pattern, rest the panel for at least one hour or run the manufacturer-recommended pixel refresh routine before treating it as permanent burn-in that warrants a return.

For suspected pixel defects on QD-OLED specifically, photograph the solid colour pattern where the anomaly contrasts most sharply against the background. QD-OLED subpixel anomalies can manifest as coloured fringes or irregular specks rather than the square black or bright dots typical of LCD pixel failures, so include both a close-up shot and a normal seating-distance shot in your documentation. That dual-perspective approach helps Alienware or Dell support staff understand whether the issue is a true subpixel defect, a temporary retention artefact from recent static content, or a setup-related brightness change caused by ABL or HDR tone mapping. Including the exact test pattern name and the brightness percentage used during the capture makes your evidence significantly more actionable for support teams reviewing your case.

HDR, ABL, and uniformity testing setup on the AW2725DF

Before running uniformity and gradient tests on the AW2725DF, confirm the GPU is not outputting HDR. Open Windows Display Settings and verify that HDR is toggled off. With HDR active, the panel's ABL (automatic brightness limiter) can engage on large bright areas, producing whole-screen brightness reduction when switching from a dark test pattern to a white field.⁵ ABL is a power and thermal limitation built into OLED displays, not a defect.

In SDR mode, ABL does not engage on test patterns at normal brightness levels because the overall panel luminance stays well below the threshold that triggers the limiter. Run the uniformity test in SDR with the panel at its default SDR brightness setting for the most representative baseline assessment. Confirming the SDR state before each test prevents the misleading impression of whole-screen brightness instability that ABL can produce when it engages on large bright fields.

Near-black behaviour and QD-OLED uniformity characteristics

OLED panels deliver inherently better uniformity than LCD because each pixel controls its own brightness independently.² You may see minor luminance variation on near-black patterns. Slight variation in very dark fields is a characteristic of QD-OLED panel construction and is distinct from the patchy dirty screen effect of VA panels. After confirming clean uniformity on both grey and near-black fields, proceed to the dead pixel sweep using all six solid colour patterns to complete the panel evaluation.

QD-OLED text rendering and VRR setup on the AW2725DF

QD-OLED's triangular subpixel layout affects how text renders at 1440p. Windows ClearType was designed for RGB stripe subpixel arrangements, and its horizontal subpixel positioning hints do not map cleanly to the triangular layout.³ At 108.8 PPI on a 27-inch QD-OLED, this mismatch can produce faint colour fringing on thin text strokes when ClearType is active. Run the text rendering and subpixel patterns in this ClearType fringing test from your seating distance to check for visible fringing, since it is easy to miss on a quick glance and easy to stop noticing once you get used to how your own AW2725DF looks. If fringing appears, switching Windows to greyscale antialiasing via Control Panel > ClearType Text Tuner reduces the colour artefacts at a small cost to apparent sharpness.

Configuring VRR and setting the FPS floor

The AW2725DF supports FreeSync Premium Pro and G-Sync Compatible up to 360 Hz. For G-Sync Compatible on Nvidia, connect via DisplayPort and activate it in Nvidia Control Panel > Set Up G-Sync. In Radeon Software for AMD, FreeSync activates automatically when detected. Confirm VRR is active by checking the GPU performance overlay in a game. Setting a minimum FPS floor near the bottom of the VRR range in your GPU software helps prevent flicker from large refresh-rate swings, which is more noticeable on QD-OLED than on conventional LCD in dark scenes.⁶ Alienware's Premium Panel Exchange covers this model during the warranty period; confirm coverage details with your order documentation.

ASUS ROG Swift OLED PG27AQDP Monitor Test

The ASUS ROG Swift OLED PG27AQDP is a 27" W-OLED panel running at 480 Hz.¹ W-OLED uses a white OLED emitter with colour filters to form the image.² The main long-term concern is pixel retention from static on-screen elements, so use this tool to run dead pixel sweeps and check whether any early retention is developing on the solid grey patterns.³

Specifications¹

W-OLED vs QD-OLED: what changes for panel testing

W-OLED uses a fundamentally different architecture from QD-OLED, and understanding those structural differences is essential for interpreting your test results correctly. W-OLED panels layer a single white OLED emitter behind standard RGB colour filters, the same basic approach used in LG OLED TV panels for years, which simplifies the light path compared to QD-OLED's individual quantum dot emitters.² This single-emitter architecture produces inherently excellent uniformity because every pixel is illuminated through the same white light source and filter substrate, eliminating the per-emitter variation that can affect QD-OLED panels.

Why grey matters more than black

Consequently, W-OLED panels typically show better out-of-box uniformity on grey patterns than QD-OLED, which relies on individual quantum dot emitters per subpixel that can vary slightly in output characteristics across the panel surface.⁴ When you run the uniformity test on the PG27AQDP, expect a noticeably more consistent grey field than you would find on VA or budget IPS panels at the same size, and use that consistency as your baseline for detecting any anomalies specific to your unit.

The primary long-term test on W-OLED is not uniformity but image retention, which is the Achilles heel of all OLED technologies regardless of sub-type. The solid grey pattern at 50% grey is the single most sensitive diagnostic for detecting early image retention from static content, because mid-tone luminance differences stand out more clearly against a uniform grey field than against pure black or pure white.⁴ Run this check in normal room lighting from your seating position, and any faint ghost image of a taskbar, game HUD, or browser bar visible on the grey field indicates retention that may respond to a pixel refresh cycle from the OLED Care+ menu.

How to judge early OLED retention

How to judge early OLED retention

A faint ghost on an OLED panel does not automatically mean permanent burn-in, and jumping to that conclusion without proper diagnosis can lead to unnecessary returns or missed warranty windows. Note precisely what static content was on screen before the test, how long it remained visible without changing, and whether the ghost appears on grey, black, and all solid colour patterns or only on specific tones. If the ghost fades noticeably after the panel rests for an hour or after running the built-in pixel refresh cycle from the OSD, it was likely temporary image retention rather than permanent material degradation. If the ghost remains clearly visible after multiple checks separated by rest periods, document the exact location, shape, and pattern for warranty assessment with ASUS support.

Resist the temptation to compare your OLED results directly against LCD uniformity expectations, because the two technologies fail in fundamentally different ways. OLED panels are typically more even on grey fields than LCD, but they can show mura, subtle tint shifts, or temporary retention that have no direct LCD equivalent. The only useful baseline for your specific panel is the pattern you can reproduce consistently after correcting HDR state, brightness level, and VRR settings to a known configuration.

480 Hz setup and retention testing workflow on the PG27AQDP

Connect via DisplayPort 1.4 or HDMI 2.1 to access 480 Hz at 1440p. In Windows Display Settings, confirm 480 Hz appears in the refresh rate dropdown and select it before running any tests. Enabling the maximum refresh rate before testing ensures the panel's pixel drivers are operating under the same electrical load they will experience during real workloads, which can subtly affect pixel response behaviour and defect visibility compared to testing at 60 Hz.

Running the dead pixel sweep at 480 Hz

Run the dead pixel sweep at the full 480 Hz refresh rate to ensure all panel drivers are active and operating under normal conditions. W-OLED defects most commonly appear as dark spots (missing emission) rather than stuck bright pixels, because OLED cells default to the off state when the drive transistor or circuit fails, which is the opposite failure mode from typical LCD panels.⁵ Each solid colour pattern isolates different failure types. Spend the full 30 seconds on each colour, scanning the entire panel surface including corners.

After the pixel sweep, open the 50% grey pattern for the retention check. Early retention visible on grey may be temporary image persistence rather than permanent burn-in; turn the display off for at least one hour, or longer if needed, before reassessing it under the same room lighting conditions so you can accurately compare the result against your initial observation.³ Run the OLED Care+ pixel refresh cycle from the OSD if you find any retention that persists after a rest period. Enable OLED Care+ for ongoing use to reduce long-term retention risk from static desktop elements.

VRR setup and 480 Hz confirmation on the PG27AQDP

At 480 Hz each frame occupies 2.08 ms on the display. W-OLED's self-emissive pixels achieve near-instantaneous transitions that no LCD panel at any refresh rate can match.⁶ Running the response time patterns on the PG27AQDP should show no perceptible smearing or inverse ghosting, as pixel transitions complete well within each 2.08 ms frame interval. If you see any trailing artefacts on the response time test, verify the overdrive mode is set to Normal in the OSD rather than Extreme, which can produce faint overshoot even on OLED at its most aggressive setting.

Enabling VRR and confirming 480 Hz

The PG27AQDP supports G-Sync Compatible and FreeSync Premium Pro. Connect via DisplayPort 1.4 for VRR at the full 480 Hz range. Enable G-Sync Compatible in Nvidia Control Panel or FreeSync in Radeon Software. OLED VRR can still show brightness flicker during large refresh-rate swings, especially in dark scenes, so use a frame-rate floor if flicker becomes visible.⁶ Confirm 480 Hz is active in Windows Advanced Display Settings before running the final test patterns. OLED Care+ remains active during VRR operation without interfering with variable refresh. With 480 Hz confirmed and the retention check complete, your baseline assessment of this panel is done, and repeating that 50% grey check periodically in this monthly OLED retention tracker over the panel's lifetime is worth the habit, since early ghosting is far easier to catch and refresh away than to fix once it sets in.

ASUS ROG Swift OLED PG27UCDM Monitor Test

The ASUS ROG Swift OLED PG27UCDM is a 26.5" 4K QD-OLED panel marketed as a 27-inch monitor, with a 3840×2160 resolution, 240 Hz refresh rate, 0.03 ms GtG response time, and DisplayHDR 400 True Black certification.¹ At about 163-166 PPI, static desktop elements are rendered with more pixels than on a 1440p OLED of the same size, so grey-pattern checks are useful for spotting faint image retention early.² ASUS OLED Care features such as screen saver dimming, logo brightness adjustment, pixel cleaning, and the Neo Proximity Sensor are designed to reduce burn-in risk during static desktop use.³

Specifications¹

4K QD-OLED text sharpness: why fringing is less visible at this density

At 4K on a 27-inch-class OLED, pixel density reaches about 163-166 PPI. TFTCentral describes this as the highest pixel density available from a mainstream OLED monitor at launch and notes that the PG27UCDM uses a squarer QD-OLED subpixel shape that improves text clarity compared with older triangular QD-OLED layouts.² That means colour fringing on thin text strokes is much less visible than on many 1440p QD-OLED monitors, especially at normal desk viewing distances.

Verifying text clarity from your desk position

Run the text rendering and checkerboard patterns from your seating position to verify this. On most desk setups at 60-70 cm, text on the PG27UCDM is sharp and clean without ClearType adjustments. If you do see colour fringing on text at your normal distance, check that your Windows display scaling is set to 125-150% or higher. At 100% scaling on a 4K 27-inch-class panel, text is physically small enough that the subpixel geometry question becomes secondary to the overall character size.

How to judge retention before assuming burn-in

How to judge retention before assuming burn-in

Retention needs a timeline. Note what static content was visible, how long it stayed on screen, and whether the ghost appears on grey, black, and solid colours. Temporary retention often fades after rest or a cleaning cycle. Persistent burn-in remains tied to the same pixels after those steps. The difference matters because OLED warranty claims depend on whether the image persists after recommended care.

Use the grey pattern as a periodic benchmark rather than a one-time panic check. Run it after a mixed-use session, then again after the panel has rested or cleaned. If the ghost weakens, you are seeing retention management at work. If it remains stable, document the location and pattern before contacting support.

4K OLED burn-in risk and the retention check workflow

At 4K, static interface elements like the Windows taskbar or a game HUD occupy more individual pixels than at 1440p on the same panel size. The practical precautions against burn-in are the same as for any OLED at this tier: enable ASUS OLED Care, use a dark taskbar, and run a retention check using the solid grey pattern every one to two months.

ASUS describes OLED image persistence or burn-in as a risk when a static high-contrast image is displayed for a prolonged period, and lists Pixel Shift, Screen Saver, Screen Move, Adjust Logo Brightness, and Pixel Cleaning as OLED screen-protection mechanisms.³ The PG27UCDM also adds a Neo Proximity Sensor that applies Screen-off when no object is detected nearby.

Running the retention check

Open the 50% grey pattern and view the panel in normal room lighting from your seating position. Any faint ghost of the taskbar or a frequently displayed HUD element visible on the grey field indicates early retention. Early retention may respond to the Pixel Cleaning cycle available from the OLED Care menu in the OSD. ASUS states that Pixel Cleaning takes approximately 6 minutes, can activate when the monitor turns off, and should not be interrupted by unplugging the power cord. If residual image or burn-in conditions remain, ASUS recommends turning the screen off for at least one hour, or performing Pixel Cleaning three times if the condition disappears after repeated cycles. Document any retention with photos for warranty assessment.

HDR configuration and 240 Hz setup on the PG27UCDM

The PG27UCDM is certified for VESA DisplayHDR 400 True Black. VESA's True Black 400 tier requires a minimum 400 cd/m² 8% centre-patch luminance, a maximum black level of 0.0005 cd/m², 10-bit video signal support, and HDR10 support.⁴ Enable HDR output from Windows before testing HDR, then run all panel quality tests in SDR mode first so you can separate display defects from HDR pipeline behaviour.

With HDR active, ABL (automatic brightness limiter) can reduce whole-screen brightness when large bright areas are displayed. TFTCentral explains that OLED panels have content-dependent power use, so small bright windows can reach high peak luminance while larger bright areas are reduced by ABL as a technical and power limitation.⁵ That is normal OLED behaviour, not a dead pixel or panel defect.

DisplayPort 2.1 and the 240 Hz connection

For 240 Hz at 4K, DisplayPort 2.1 is the preferred connection on the PG27UCDM because it can deliver 4K 240 Hz without compression. RTINGS notes that the monitor can reach its maximum 240 Hz refresh rate without compression thanks to its DisplayPort 2.1 bandwidth, and TFTCentral describes the DisplayPort 2.1 UHBR20 connection as supporting 3840×2160 at 240 Hz without DSC when the graphics card supports it.⁶ HDMI 2.1 and DisplayPort 1.4 with DSC can also support 4K 240 Hz depending on GPU, cable, and monitor settings. Confirm 240 Hz is active in Windows Advanced Display Settings after connecting.⁷

Enable G-Sync Compatible via Nvidia Control Panel or FreeSync Premium Pro via Radeon Software. Verify ASUS OLED Care is active in the OSD before regular use, as it reduces burn-in risk on this high-density QD-OLED. With the full test sequence complete, you have a factual quality baseline for this 4K OLED panel before committing, and making the 50% grey retention check in this OLED burn-in watch list a recurring habit rather than a one-time unboxing task pays off, since early ghosting only stays reversible if you catch it early.

Samsung Odyssey OLED G5 Monitor Test

Samsung's Odyssey OLED G5 (G50SF) is a 27" QD-OLED panel running at 180 Hz.¹ QD-OLED uses a triangular subpixel layout instead of the standard RGB stripe, which can produce colour fringing or softness on fine text at normal desktop viewing distances.² Use this tool to inspect sharpness on the text rendering patterns and check for pixel anomalies across the solid colour sweeps.

Specifications¹

QD-OLED text rendering at 1440p on the Odyssey OLED G5

At 1440p on a 27-inch QD-OLED, pixel density reaches 108.8 PPI, which is noticeably lower than the 163 PPI you would find on a 4K panel of the same screen size and this difference has a direct impact on text rendering sharpness.³ The triangular subpixel layout of QD-OLED interacts differently with Windows ClearType rendering than the RGB stripe panels Windows was designed for. ClearType uses the horizontal position of individual red, green, and blue subpixels to enhance the apparent sharpness of text by lighting only one edge subpixel of a character stroke.⁴ When subpixels are arranged in a triangle rather than a row, this can produce colour fringing on thin strokes rather than sharpening.

Checking text rendering before gaming

Run the text rendering and checkerboard patterns in this tool to assess how your specific unit handles fine text at your intended seating distance under your typical room lighting conditions. Fringing appears as a faint red or blue colour tint along one edge of thin text strokes, and it is most visible on high-contrast black text displayed against a white background. For used panels, treat the grey retention check as a purchase condition before payment. A ghost of a taskbar, browser bar, or game HUD on a 50 percent grey field is easier to verify before completing the purchase.

Switching Windows text rendering from ClearType to greyscale antialiasing, via the ClearType Tuner in Control Panel, produces measurably cleaner text output on QD-OLED panels at the cost of slightly lower apparent horizontal sharpness.⁵ Whether this tradeoff is worthwhile for your specific use case depends on how much text-heavy productivity work you do on this display compared to gaming and media consumption.

How to interpret QD-OLED text results

How to interpret QD-OLED text results

Text sharpness perception is partly personal and partly dependent on your specific viewing geometry, so establish your baseline at the desk distance and seating position you actually use before making any judgements about the panel. Sit at your normal desk distance first and evaluate the text rendering patterns from that position, then move slightly closer only to confirm what you observed rather than using close-up inspection as your primary assessment method. A faint colour fringe that disappears entirely at your normal working distance is far less important than a fringe that remains visible while you read documents or browse the web during everyday use. If text looks noticeably worse than expected for a 1440p panel at this size, compare ClearType rendering with greyscale antialiasing side by side and keep the setting that produces the cleanest edges in your actual applications rather than in the test pattern alone.

For used panels specifically, treat the grey retention check as a non-negotiable purchase condition that should be verified before payment changes hands. A ghost image of a taskbar, browser bar, or game HUD visible on a 50 percent grey field is far easier to confirm and document before completing the purchase than after you have already set up the monitor and the return window has closed. If the seller cannot reproduce a clean, uniform grey field during your inspection, the safest financial choice is to walk away and find a different unit without prior retention damage.

180 Hz configuration and pixel check on the Odyssey OLED G5

Connect via DisplayPort before opening Display Settings to ensure the full bandwidth path is active from the start. In Windows, navigate to System > Display > Advanced Display and confirm that 180 Hz appears in the refresh rate list as an available option. Select 180 Hz, verify the change takes effect, and then proceed to the dead pixel sweep with the panel running at its intended operating refresh rate.

Identifying QD-OLED subpixel failures

QD-OLED subpixel failures typically manifest as small coloured dots or subtle fringes rather than the full-pixel black dots characteristic of dead LCD pixels, so understanding the subpixel layout is essential for accurate defect identification.⁶ Each solid colour pattern isolates a specific failure type: cyan dots on a red pattern indicate blue subpixel failures, while yellow dots on a blue pattern point to red subpixel failures. Run all six patterns in sequence and spend a full 30 seconds scanning each one methodically.

After completing the colour sweeps, open the 50% grey pattern for a burn-in and retention assessment, which is equally important for new and used units. Samsung's Panel Care guidance includes Pixel Shift, Adjust Logo Brightness, Screen Optimization, and Pixel Refresh when available on this model.⁷ If you purchased this monitor used, the grey pattern retention check is absolutely essential before accepting the unit and completing payment. A ghost image of a taskbar or game HUD clearly visible on the grey field confirms prior retention damage that permanently affects the panel's value and remaining lifespan.

Uniformity and VRR configuration for the Odyssey OLED G5

OLED panels deliver inherently better uniformity than LCD because each pixel controls its own brightness independently.⁸ Run the mid-grey uniformity pattern to confirm this on your unit. The Odyssey OLED G5 should show a highly consistent grey field without the patches or horizontal bands that VA LCD panels produce at the same size. Minor luminance variation on very dark near-black patterns is a characteristic of QD-OLED panel construction. It differs from the static DSE of VA panels in that it appears less defined and does not create the worm-like streaks typical of VA. If you see significant variation on a mid-grey field rather than only on near-black patterns, document it and contact Samsung support.

Enabling FreeSync and setting the VRR floor

For VRR configuration, connect via DisplayPort and confirm 180 Hz in Windows Advanced Display Settings. AMD FreeSync is available when connected to a compatible AMD graphics card. For Nvidia systems, enable G-Sync Compatible in Nvidia Control Panel for this display. OLED VRR can cause brightness flicker on some panels when frame rates swing widely, especially in darker scenes.⁹ If your GPU control panel exposes an anti-flicker mode or minimum frame-rate floor, use it when flicker is visible. With VRR confirmed, pixel health verified across the six colour sweeps, and the 50% grey retention check complete in this pre-owned OLED burn-in survey, your quality assessment of the G5 is ready, and if you are buying secondhand, that grey field check is non-negotiable before the seller's money changes hands, not after.