
Asus ROG Strix XG27ACDNG
Score: 87/100
LG 27G640A-B
Score: 88/100Rankings

The LG 27G640A-B is a 27-inch QHD IPS gaming monitor with a blistering 300 Hz refresh rate and 1 ms response, delivering ultra-smooth visuals. Its main trade-off is the lack of disclosed brightness/contrast data and no integrated speakers. Ideal for esports enthusiasts with a powerful GPU who value speed and color accuracy.

The ASUS ROG Strix XG27ACDNG is a 26.5-inch QD-OLED monitor offering an extreme 360 Hz refresh rate, 0.03 ms response and 99% DCI-P3 color coverage with HDR support. Its premium performance comes with high power draw, potential OLED burn-in risk, and a hefty build without speakers. Targeted at esports pros and HDR enthusiasts demanding top-tier visual fidelity.
| Attribute | ![]() | ![]() |
|---|---|---|
26.5 inches | 27 inchesbest | |
360 Hzbest | 300 Hz | |
| ↓ lower better | 0.03 msbest | 1 ms |
250 nitsbest | — | |
99 %best | 95 % | |
1,500,000best | — | |
| ↓ lower better | 7.44 kg | 5.5 kgbest |
1best | 1best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Display(5) | ||
Panel Type | QD-OLED | IPS |
Screen Size (inches) | 26.5 inches | 27 inches |
Refresh Rate (Hz) | 360 Hz | 300 Hz |
Response Time (ms) | 0.03 ms | 1 ms |
Color Gamut Coverage (%) | 99 % | 95 % |
General(1) | ||
Warranty (years) | 3 years | 1 years |
Build & Design(3) | ||
Weight (with stand) (kg) | 7.44 kg | 5.5 kg |
Width (with stand) (mm) | 610.3 mm | 614.68 mm |
Height (with stand) (mm) | 509.4 mm | 538.48 mm |


Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the monitor's premium QD-OLED panel, ultra-high 360 Hz refresh rate, and robust anti-flicker and burn-in technologies, positioning it as a top-tier choice for esports and HDR work, though they note the scarcity of in-depth independent testing and lingering OLED burn-in worries.
No specific user reviews or testimonials were found in the research, indicating limited publicly shared consumer feedback.

Professional reviewers and editors have not published detailed tests for the LG 27G640A yet; product listings highlight its 300 Hz speed, HDR400 support, and dual adaptive-sync technologies, but performance claims remain unverified.