ASUS ROG Swift OLED PG27AQDP / MSI MPG 491CQP QD-OLED

ASUS ROG Swift OLED PG27AQDP: PG27AQDP · 26.5-inch WOLED, 2560 × 1440, 480 Hz; single model

MSI MPG 491CQP QD-OLED: MPG 491CQP QD-OLED, 49-inch 32:9 curved monitor. The Samsung Odyssey OLED G9 of the same size and MSI’s other 49-inch models are separate.

SpecificationASUS ROG Swift OLED PG27AQDPMSI MPG 491CQP QD-OLED
Release year20242024
Panel26.5-inch WOLED; anti-glare surface

WOLED uses a white OLED layer with colour filters; each pixel makes its own light, so blacks switch fully off.

ASUS		49-inch QD-OLED; 5120 × 1440 (DQHD), 32:9; 1800R curve

The 32:9 ratio gives a workspace equivalent to two 27-inch 1440p monitors side by side. The 1800R curve keeps the edges closer to the eyes.

MSI
Resolution2560 × 1440, 16:9 ASUS—
Refresh rateUp to 480 Hz

480 Hz improves motion clarity in fast games; reaching it also needs the graphics card to render close to 480 frames.

ASUS		—
Response time0.03 ms (GtG)

GtG is the grey-to-grey pixel transition time, not total input lag.

ASUS		—
Brightness and contrastHDR peak 1,300 cd/m²; contrast 1,500,000:1 (typical)

The peak figure applies to a small part of the screen; ASUS notes that peak brightness may vary with colour pre-calibration.

ASUS		Typical SDR 250 nits; 1,500,000:1; DisplayHDR True Black 400

True Black 400 is the OLED-class certification for very low black level and 400-nit HDR brightness.

MSI
Colour99% DCI-P3, 135% sRGB; 10-bit; ΔE < 2

A colour pre-calibration report is included in the box.

ASUS		99% DCI-P3, 146% sRGB, 98% Adobe RGB; 10-bit (1.07 billion colours) MSI
HDR and certificationsHDR10; VESA DisplayHDR 400 True Black ASUS—
Variable refreshVESA AdaptiveSync Display 480Hz; AMD FreeSync Premium; G-SYNC Compatible

Variable refresh matches the monitor’s rate to the graphics card’s frame rate to prevent tearing.

ASUS		—
Video inputs1 × DisplayPort 1.4 (DSC), 2 × HDMI 2.1 (FRL)

DSC compresses the signal in a way considered visually lossless so that 1440p 480 Hz fits within DisplayPort 1.4 bandwidth.

ASUS		—
Other connections2 × USB 3.2 Gen 1 Type-A hub, headphone jack; no speakers ASUS—
StandTilt +20°/−5°, swivel ±30°, pivot ±90°, height 0–110 mm; 100 × 100 VESA; 1/4-inch tripod socket ASUS—
Power consumptionUnder 27 W in use; under 0.5 W standby, 0.3 W off ASUS—
Size and weightWith stand 60.5 × 54.8 × 27.4 cm, 6.2 kg; without stand 60.5 × 35.1 × 5.0 cm, 3.5 kg

ASUS states the dimensions are estimates and may vary by region.

ASUS		With stand 1195 × 328 × 410 mm; without stand 1195 × 190 × 372 mm; net 10.3 kg MSI
Warranty3 years, including OLED burn-in

Burn-in is when long-static images leave a mark on an OLED panel; the OLED Care features aim to reduce it.

ASUS		3 years, including panel burn-in

Static images left on an OLED panel for long periods can leave permanent marks; MSI covers this risk under warranty.

MSI
In the boxDisplayPort cable, Ultra High Speed HDMI cable, USB 3.2 cable, power adapter, VESA mount kit, calibration report, ROG pouch ASUS—
Refresh and response—144 Hz (adaptive range 48–144 Hz); 0.03 ms (GtG)

Adaptive sync prevents tearing while the frame rate stays between 48 and 144. Reaching 144 fps at full resolution needs a very powerful graphics card.

MSI
Adaptive sync—AMD FreeSync Premium Pro

The Premium Pro tier includes low frame rate compensation and low-latency tone mapping in HDR.

MSI
Connections—1 × DisplayPort 1.4a; 2 × HDMI 2.1; 1 × USB-C (DP Alt Mode, 90 W PD); 2 × USB 2.0 Type-A; 1 × USB 2.0 Type-B; headphone out

USB-C takes video from a laptop over one cable and charges it at up to 90 W. The USB ports run at USB 2.0 speed; there are no built-in speakers.

MSI
Multi-view—PiP / PbP

PbP splits the 49-inch screen side by side between two sources to show two computers at once; PiP shows one source in a small window over the other.

MSI
Surface—Anti-reflection coating MSI
Stand and mounting—Tilt –5° to 20°; swivel –30° to 30°; height 0–100 mm; VESA 100 × 100 MSI