42 facts in comparison
KOORUI S2741LM vs Acer Nitro XV275K P5biipruzx vs ASUS ROG Strix OLED XG27ACDNG
Two 4K Mini-LED panels and one 1440p OLED — which means this comparison is really resolution against speed.
The 4K pair are sharper and brighter, and either will handle HDR properly thanks to their zone counts. The OLED runs at more than double their refresh rate with near-instant response, and gives up pixel density to do it. Competitive players will take the third; everyone else should probably take one of the first two.
Category strengths
- KOORUI S2741LM
- Acer Nitro XV275K P5biipruzx
- ASUS ROG Strix OLED XG27ACDNG
Spec wins (head-to-head)
- KOORUI S2741LM 1
- Acer Nitro XV275K P5biipruzx 0
- ASUS ROG Strix OLED XG27ACDNG 7
Why KOORUI S2741LM?
- Higher peak brightness ?1,400 nits vs 1,000 nits
Why Acer Nitro XV275K P5biipruzx?
No standout advantages.
Why ASUS ROG Strix OLED XG27ACDNG?
- OLED Panel type ?OLED vs IPS
- A much higher refresh rate ?360 Hz vs 160 Hz
- A much faster response time ?0.03 ms vs 1 ms
- A much higher contrast ratio ?1,500,000 :1 vs 1,000 :1
- Slightly wider DCI-P3 colour coverage ?99 % vs 98 %
- G-Sync Compatible Adaptive sync ?G-Sync Compatible vs FreeSync
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- Response timePicture1 ms vs 1 ms vs 0.03 ms — 97% less for the ASUS ROG Strix OLED XG27ACDNG
Grey-to-grey response; lower reduces motion blur.
- Refresh ratePicture160 Hz vs 160 Hz vs 360 Hz — 2.3× more for the ASUS ROG Strix OLED XG27ACDNG
Higher refresh rates are smoother for gaming and scrolling.
The step from 60 to 120 Hz is obvious; differences above 120 Hz are far subtler in everyday use.
- Adaptive syncGamingFreeSync vs FreeSync vs G-Sync Compatible — advantage ASUS ROG Strix OLED XG27ACDNG
Variable-refresh technology for tear-free motion.
- KVM switchConnectivity— vs No vs Yes — only the ASUS ROG Strix OLED XG27ACDNG has it
Control two computers with one keyboard and mouse.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for picture KOORUI S2741LM takes the category 66 to 51.
- Best for gaming ASUS ROG Strix OLED XG27ACDNG takes the category 100 to 45 — driven by adaptive sync (FreeSync vs FreeSync vs G-Sync Compatible).
- The safe all-rounder KOORUI S2741LM wins more of the categories that carry real weight, topping the overall VS Score at 73.
Where each one falls short
KOORUI S2741LM
- Response time: 1 ms vs 1 ms vs 0.03 ms
- Refresh rate: 160 Hz vs 160 Hz vs 360 Hz
- Adaptive sync: FreeSync vs FreeSync vs G-Sync Compatible
- 11 specs are unreported (shown as Unknown) and excluded from its scores.
Acer Nitro XV275K P5biipruzx
- Contrast ratio: — vs 1,000 :1 vs 1,500,000 :1
- Peak brightness: 1,400 nits vs 1,000 nits vs 1,000 nits
- KVM switch: — vs No vs Yes
- 3 specs are unreported (shown as Unknown) and excluded from its scores.
ASUS ROG Strix OLED XG27ACDNG
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 6 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Picture
Larger screens are more immersive; measured diagonally.
The total pixel count; higher is sharper.
The panel technology; OLED offers the best contrast.
The more specific panel or backlight technology (e.g. QD-OLED, WOLED or Mini-LED VA).
The native or supported bit depth used to reproduce colour gradients.
The display surface treatment and its balance of glare control and image clarity.
Higher refresh rates are smoother for gaming and scrolling.
Grey-to-grey response; lower reduces motion blur.
Higher brightness makes HDR highlights pop.
The ratio between the brightest and darkest output.
Wider colour gamut for more vivid, accurate colour.
Full sRGB coverage keeps everyday content and photos colour-accurate.
The certified HDR tier.
Pixels per inch; higher looks sharper.
Dims parts of the backlight independently to improve contrast.
More independently controlled zones can improve HDR precision.
Gaming
Variable-refresh technology for tear-free motion.
Syncs the refresh rate to the GPU.
Backlight strobing for clearer motion.
The delay between an input and the image changing; lower is better.
The minimum-to-maximum refresh range over which variable refresh rate operates.
Ergonomics & design
The width-to-height ratio (e.g. 16:9, 21:9).
The curve radius (e.g. 1000R); blank for a flat panel.
Raise and lower the panel.
Angle the panel up and down.
Rotate the panel left and right.
Rotate to portrait orientation.
The VESA wall / arm mount pattern (e.g. 100 x 100 mm).
Connectivity
More HDMI inputs connect more devices.
The highest HDMI standard supported by the monitor.
DisplayPort inputs, preferred for high refresh rates.
The highest DisplayPort standard supported by the monitor.
A USB-C input, often with power delivery for laptops.
Charges a connected laptop over USB-C.
Built-in USB ports for peripherals.
Integrated speakers.
A 3.5 mm audio output for headphones or external speakers.
Control two computers with one keyboard and mouse.
Features
A built-in camera for video calls.
A built-in microphone for calls.
A wired network port for USB-C docking.
Shows inputs from two computers side by side.
Specs last verified August 8, 2026KOORUI S2741LM: 31 of 42 specs verified (74%)Acer Nitro XV275K P5biipruzx: 39 of 42 specs verified (93%)ASUS ROG Strix OLED XG27ACDNG: 36 of 42 specs verified (86%)Unverified specs show as Unknown — never estimated, never scored
Where to buy
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What reviewers say
The bottom line
The KOORUI S2741LM takes the top spot with a VS Score of 73, ahead of the ASUS ROG Strix OLED XG27ACDNG (70) and the Acer Nitro XV275K P5biipruzx (60). The KOORUI S2741LM stands out for Picture. The ASUS ROG Strix OLED XG27ACDNG stands out for Gaming.
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