MSI MPG 491CQP QD-OLED / ASUS ROG Swift OLED PG27AQDM

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.

ASUS ROG Swift OLED PG27AQDM: PG27AQDM: a 26.5-inch (27-inch class) 1440p 240 Hz WOLED gaming monitor. The brighter PG27AQDP (480 Hz) and the QD-OLED PG27UCDM are separate models.

SpecificationMSI MPG 491CQP QD-OLEDASUS ROG Swift OLED PG27AQDM
Release year20242023
Panel49-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		26.5-inch WOLED; 2560 × 1440 (16:9); 0.229 mm pixel pitch; anti-glare surface

WOLED is LG Display’s panel type using a white OLED layer with colour filters; each pixel makes its own light, so blacks go fully dark. Long-lasting static images raise the risk of burn-in.

ASUS
Refresh and response144 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		—
Brightness and contrastTypical 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		HDR peak 1,000 cd/m²; contrast 1,500,000:1; 10-bit (1.07 billion colours)

Peak brightness applies to a small part of the screen; with a full white screen brightness drops noticeably. ASUS notes peak brightness may vary with colour pre-calibration.

ASUS
Colour99% DCI-P3, 146% sRGB, 98% Adobe RGB; 10-bit (1.07 billion colours) MSIDCI-P3 99%; sRGB 135%; factory pre-calibration report ASUS
Adaptive syncAMD FreeSync Premium Pro

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

MSI		—
Connections1 × 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-viewPiP / 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		—
SurfaceAnti-reflection coating MSI—
Stand and mountingTilt –5° to 20°; swivel –30° to 30°; height 0–100 mm; VESA 100 × 100 MSITilt +20° / −5°; swivel ±30°; pivot ±90°; 0–110 mm height; 1/4-inch tripod socket; VESA 100 × 100 (with kit); Aura RGB

The VESA mount kit is included in the box.

ASUS
Warranty3 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		—
Size and weightWith stand 1195 × 328 × 410 mm; without stand 1195 × 190 × 372 mm; net 10.3 kg MSIWith stand 60.5 × 54.8 × 27.4 cm, 6.9 kg; without stand 60.5 × 35.1 × 5.0 cm, 4.2 kg ASUS
Refresh rate and response—240 Hz (DisplayPort); 120 Hz over HDMI; 0.03 ms (GtG)

240 Hz is only available through the DisplayPort input; ASUS’s signal table limits the HDMI inputs to 120 Hz. For PC games above 120 Hz, use a DisplayPort cable.

ASUS
HDR—HDR10

Dolby Vision and HDR10+ support are not listed.

ASUS
Variable refresh—VESA AdaptiveSync Display 240Hz; AMD FreeSync Premium; G-SYNC Compatible

Variable refresh matches the monitor to the graphics card’s frame rate to reduce tearing and stutter.

ASUS
Inputs—1 × DisplayPort 1.4 DSC; 2 × HDMI 2.0; headphone jack; 2 × USB 3.2 Gen 1 Type-A hub

DSC (Display Stream Compression) compresses the signal without visible loss so DisplayPort 1.4 has enough bandwidth for high refresh rates. There are no speakers and no USB-C input.

ASUS
OLED care and warranty—ASUS OLED Care; 2-year warranty (including panel burn-in)

The warranty also covers panel burn-in; terms may vary by region.

ASUS
Certifications—TÜV Flicker-free; TÜV Low Blue Light (hardware solution) ASUS
Power—External power adapter; 100–240 V, 50/60 Hz ASUS