ASUS ROG Swift PG27UCDM 4K QD-OLED Monitor: features and specs

The ASUS ROG Swift PG27UCDM is a 4K gaming monitor built around a fourth-generation QD-OLED panel. It pairs a 240Hz refresh rate with a very fast response time and a connector set meant for current graphics cards. Here is what the main specs mean and what to check before choosing it.

What QD-OLED brings

In an OLED display each pixel produces its own light, so black pixels can switch fully off. QD-OLED adds a quantum-dot layer to produce colour. ASUS says its fourth-generation panel gives sharper images, crisp text and a longer lifespan than earlier OLEDs. The monitor is listed as 26.5 inches (sold as 27-inch) at 3840 x 2160, which is a high pixel density for this size and is why text tends to look sharp.

240Hz and 0.03ms

The refresh rate tells you how many times per second the image updates. 240Hz is smooth for fast games, though you need a graphics card able to produce high frame rates at 4K to see it. The listed 0.03ms response time is typically measured grey-to-grey; OLED pixels change state very quickly, which reduces motion blur. G-SYNC Compatible support helps match the screen to the card's frame rate to avoid tearing.

DisplayPort 2.1a and other connections

The monitor has DisplayPort 2.1a UHBR20 with the full 80 Gbps bandwidth, which ASUS says carries uncompressed 4K at 240Hz. To use it, you need a graphics card with a matching output; otherwise the monitor falls back to other methods or lower settings. It also has HDMI 2.1 and USB-C with 90W power delivery, so one cable can show video and charge a compatible laptop. A tripod socket is listed too.

Colour and HDR

ASUS lists 99% DCI-P3 coverage, true 10-bit colour, a Delta E below 2, Dolby Vision support and VESA DisplayHDR 400 True Black compliance. Delta E measures colour accuracy: lower numbers mean closer to the intended colour, and values under 2 are generally hard to tell apart by eye. These figures make it relevant to photo and video editing as well as games.

OLED Care Pro and burn-in

OLED panels can retain static images over a long time. ASUS includes OLED Care Pro features, including a Neo Proximity Sensor that detects when you are away and switches the screen to black to reduce the risk of burn-in. DisplayWidget Center lets you adjust these functions with a mouse. Good habits, such as using screen savers, still help.

What's in the box

The box includes DisplayPort 2.1 (DP40), HDMI Ultra High Speed, USB 3.2 and USB-C cables, a power cord, a VESA mount kit, a ROG pouch, a microfibre cloth, a quick start guide and a warranty card. ASUS lists a three-year warranty.

Who it suits

It suits players with a powerful graphics card who want sharp 4K at high refresh rates, and creators who want wide colour on a desk-sized panel.

What to check before you buy

• Graphics card: confirm the card's outputs and whether it can drive 4K at high frame rates.
• Desk space: it measures about 24.0 x 21.6 inches with its stand and weighs 16.8 lb.
• Mounting: a VESA kit is included if you prefer an arm.
• Use pattern: consider how much static content, such as taskbars, you display for hours.
• Software offers: the listing mentions a time-limited creative software offer; check whether it still applies.

The short version

• 26.5-inch 4K (3840 x 2160) QD-OLED panel at 240Hz with 0.03ms response.
• DisplayPort 2.1a UHBR20, HDMI 2.1 and USB-C with 90W power delivery.
• 99% DCI-P3, 10-bit colour, Dolby Vision and DisplayHDR 400 True Black.
• OLED Care Pro with a Neo Proximity Sensor; three-year warranty listed.

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