These are the two established options in 27-inch 1440p OLED gaming, and they represent the two competing OLED panel technologies — ASUS uses Samsung's QD-OLED, LG uses its own WOLED. Both are 240Hz, both achieve sub-millisecond response times, and both will produce the best motion quality you can get from a 1440p gaming panel. The differences are real but more nuanced than the headline specs suggest.

Specs Comparison

Panel Technology: QD-OLED vs WOLED

ASUS's PG27AQDM uses Samsung's QD-OLED (Quantum Dot OLED) panel. QD-OLED places a quantum dot conversion layer on top of a blue OLED emitter array, producing RGB subpixels with very high color purity. Samsung's Gen 3 QD-OLED panel in this monitor achieves approximately 1,000 nits peak brightness on a 3% white window and covers about 99.3% DCI-P3 — exceptional color volume.

LG's 27GR95QE uses LG's WOLED (White OLED) technology with a WRGB subpixel arrangement. WOLED adds a white subpixel alongside RGB, which helps maintain brightness uniformity across the panel but results in slightly lower color purity than QD-OLED. Peak brightness is approximately 800–850 nits on a comparable 3% window. WOLED panels historically show better panel uniformity — brighter and darker areas of the screen measure more consistently.

In HDR gaming and content consumption, QD-OLED's color volume and peak brightness advantage over WOLED is perceptible in direct comparison. For SDR gaming and everyday use, both technologies are virtually indistinguishable in normal use.

Response Time and Gaming Performance

Both monitors achieve 0.03ms GtG response times — a meaningless distinction in practice, since both are functionally instantaneous. Neither monitor adds perceptible ghosting or trailing during fast motion at 240Hz. The 240Hz refresh rate with AMD FreeSync Premium Pro (on both) and NVIDIA G-Sync Compatible (on both) delivers smooth, tear-free motion.

MPRT (Moving Picture Response Time, a measurement of per-frame blur in motion rather than pixel transition speed) on both monitors is approximately 0.1ms with backlight strobing enabled — again, essentially identical. Both monitors support MBR (Motion Blur Reduction) strobing that can be enabled independently of VRR.

Input lag at 240Hz measures below 2ms on both panels. The ASUS and LG are equal competitors for esports, competitive FPS, and fast-paced gaming. Neither monitor has a measurable response time or input lag advantage.

HDR Brightness and Color Coverage

ASUS PG27AQDM: VESA DisplayHDR True Black 400 certified, approximately 1,000 nits peak (3% window), ~250 nits full-screen white. DCI-P3 coverage: 99.3%. NTSC coverage: 95%. The QD-OLED's color saturation on small bright objects — highlights, explosions, light sources in games — is visibly more intense than WOLED.

LG 27GR95QE: VESA DisplayHDR True Black 400 certified, approximately 800–850 nits peak (3% window), ~220 nits full-screen white. DCI-P3 coverage: 98.5%. The WOLED panel's brightness is more consistent across the full panel surface — there's less variation between edge and center brightness than on the QD-OLED.

For HDR gaming with significant bright highlights (explosions, sunlit environments, bright UI elements), the ASUS's QD-OLED panel has more visual punch. For productivity, white-background document work, and any content with large white areas, both panels perform comparably — their full-screen white brightness is similar.

Burn-in, Longevity, and Panel Care

Both monitors implement automatic pixel refreshing routines — the ASUS runs a panel refresh cycle when the monitor enters standby; the LG's Pixel Orbiting and Pixel Cleaning features similarly maintain panel health. Neither manufacturer provides burn-in warranty coverage beyond normal defect warranty (3 years on both), and long-term OLED burn-in risk is real for static content like desktop taskbars, game HUDs, and news ticker overlays.

QD-OLED panels have shown lower burn-in susceptibility in long-term use testing compared to early WOLED panels, partly due to the subpixel structure and partly due to improvements in the blue emitter efficiency. The Gen 3 QD-OLED in the ASUS is generally considered more robust for mixed content use than earlier QD-OLED generations.

For users who primarily game (variable content that shifts HUD positions), burn-in risk is low for both. For users who also use the monitor as a desktop productivity display with static taskbars and persistent widgets, exercise caution with either panel and use screensavers.

Ports, Features, and Pricing

ASUS PG27AQDM: DisplayPort 1.4 (with DSC compression for 1440p 240Hz), two HDMI 2.0, one USB-A 3.0, one USB-B (KVM upstream), two USB-A hub. The USB hub and KVM capability make the ASUS more versatile as a desktop centerpiece. The monitor retails at approximately $700–$750.

LG 27GR95QE: DisplayPort 1.4 (with DSC), two HDMI 2.0, one USB-C (DisplayPort Alt Mode, 90W PD charging), two USB-A 3.0. The LG's USB-C with 90W PD is a practical advantage for laptop users — connect a single cable from a laptop and get display, USB hub, and charging simultaneously. Retail price approximately $650–$700.

The LG's $50–100 price advantage at typical retail pricing and the USB-C 90W PD charging make it the value pick for laptop gamers. The ASUS's KVM and slightly brighter QD-OLED panel favor desktop PC users who want the absolute best HDR performance.

Best For

• ASUS ROG Swift OLED PG27AQDM Desktop PC gamers who want the absolute best HDR peak brightness and color saturation, and/or need a KVM for two computers
• LG UltraGear 27GR95QE-B Laptop gamers who want single-cable USB-C connection with charging, or budget-conscious buyers prioritizing value

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