Bottom line

LG UltraGear 27GX790B-B is a 2026 esports oled monitor aimed at a specific buying decision, not a one-size-fits-all recommendation. The most useful question is whether its strengths solve a daily problem that a less expensive or differently equipped alternative cannot. Our assessment draws on the cited maker specifications and specifically attributed third-party testing where available; WeraOne has not physically tested this unit.

Best for: Competitive players with sufficiently powerful hardware who will genuinely use either the QHD or HD high-frame-rate mode.

Where the value actually lies

Unlike conventional 240 Hz OLED models, the 27GX790B-B treats esports mode switching as its key feature. You can retain QHD definition at a maker-rated 540 Hz or choose a less detailed HD format to push the 720 Hz ceiling. The certified True Black 500 HDR tier is a distinct description of display behavior, not a measurement conducted by our team.

Verified specifications

Disadvantages and compatibility limits

An HD picture on a 27-inch display sacrifices considerable clarity, and the 720 Hz number has little value without an extremely high-fps game pipeline. OLED care remains necessary when displaying long-lasting menus or desktop toolbars.

Before committing, examine warranty and regional SKU differences, usable cable standards and how the screen will be used on long static-work days. A single headline refresh rate, contrast specification or theoretical data bandwidth does not prove the complete system will reach that mode.

What independent testing can establish

No exact-model independent test result has been verified for inclusion here. The published hardware specifications identify functions and compatibility but cannot establish real-world motion, color accuracy or HDR performance. Do not mistake a quoted manufacturer response time, noise-cancellation claim or driver rating for an independent benchmark.

Alternatives worth comparing

Samsung Odyssey G60SF stays QHD at up to 500 Hz; LG 27GX790A-B offers a lower 480 Hz ceiling; a more ordinary 240 Hz IPS display is a smarter economical choice for many players.

Pre-purchase checklist

Look for 27GX790B-B rather than the older A-suffix model, confirm actual DP cable/graphics modes and test whether your competitive title reaches the selected refresh.

Sources and method

• LG technical/product source — manufacturer specifications and advertised capabilities

Editorial research cutoff: 2026-10-23. No WeraOne hands-on or lab testing claimed. Prices, updates and availability are not asserted as current at publication time.