Rank #4 in Best OLED Gaming Monitor 2026: 10 Ranked, Brightness Listed Four Ways
ASUS ROG Strix XG27UCDMG 27-inch 4K OLED 240Hz
- Rating
- 4.4
- Ratings
- 187
- Rank
- #4
Price and rating as shown on Amazon when we collected them. Both change.
The ASUS ROG Strix XG27UCDMG is a 4K QD-OLED gaming monitor listed at £649.00, and it comes fourth in this guide. Its own listing does not agree with itself on two numbers. The product title says 27 inches; the first bullet point and the spec table both say 26.5 inches. The same spec table lists a contrast ratio of 400:1 — the sort of figure you would expect from a VA panel — sitting a line away from 'Display Technology: OLED'. Brightness is written as 400 nits, a fifth way of stating that figure in a set where other listings say '1000', '1000 nits', '250 Candela' and '100'.
On price, £649.00 puts it £50 above the 27-inch 4K OLED Gigabyte at £599.00 and £49.01 above the 49-inch VA Gawfolk at £599.99, the screen with the most ratings in the guide at 1,049. The ASUS carries 4.4 from 187 ratings. Everything on this page is taken from the Amazon listing and its customer reviews; we have not tested this monitor ourselves.
How those 187 ratings break down
An average hides its own shape. This is the spread behind the 4.4 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £649.00 |
|---|---|
| Rating | 4.4 out of 5, from 187 ratings |
| Screen size | 26.5 inches (the title says 27 inches) |
| Resolution | 3840 x 2160 (4K UHD) |
| Panel | QD-OLED, Display Type listed as OLED |
| Refresh rate and response | 240 Hz, 0.03 ms GTG |
| Contrast ratio | 400:1 (as listed) |
| Brightness | 400 nits (as listed) |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Excellent clarity and refresh rate.The technical specs are exactly what I was after. 27 inch (26.5 actual because OLED) is the perfect size for me. I upgraded from 1440p and was blown away from the jump up.Colour quality is decent, vibrant and the blacks are very deep with no crush I've noticed. I also use them in a well lit room a lot of the time and have no issue using this monitor.Would recommend this monitor. Decent bang for your buck, purchased at around £600.”
Verified purchase“Excellent, was exactly as describedPicture quality is amazing, QD OLED is on another level compared to normal LED IPSMonitor and the 0.3 response time with G-Sync is a must for tear free gaming.”
What it is up against
The rivals it was ranked against in Best OLED Gaming Monitor 2026: 10 Ranked, Brightness Listed Four Ways.
Questions people ask
Is the ASUS ROG Strix XG27UCDMG a 27-inch monitor?
The title says 27 inches, but the bullets and the spec table both say 26.5 inches. The listing carries both figures, and one reviewer notes that 26.5 inches is the actual panel size on OLED.
What contrast ratio does the ASUS ROG Strix XG27UCDMG list?
The spec table says 400:1. That is the number in the Amazon feed, on the same page as 'Display Technology: OLED' and QD-OLED picture enhancement.
What are the refresh rate and response time of the ASUS ROG Strix XG27UCDMG?
The ASUS bullets claim up to 240 Hz with 0.03 ms GTG and SmoothMotion. One customer review instead describes the '0.3 response time with G-Sync'.
What connections does the ASUS ROG Strix XG27UCDMG offer?
USB-C for data, video and charging a laptop over one cable, plus HDMI 2.1, DisplayPort 1.4 and a USB hub, as listed.
Does the ASUS ROG Strix XG27UCDMG have burn-in protection?
The listing describes ASUS OLED Care Pro with a Neo proximity sensor that darkens the screen when idle, along with Flicker-free and Low Blue Light technologies.
How much does the ASUS ROG Strix XG27UCDMG cost?
£649.00 as listed, with a 4.4 rating from 187 ratings, according to the Amazon page.
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