LG UltraGear 27-Inch OLED (GX790A) Review

No OLED has pushed the refresh-rate ceiling further than the LG UltraGear 27GX790A: 480Hz at 1440p — no dual-mode tricks, no 1080p compromise. It launched at $999.99, which positioned it as a specialist purchase; street pricing has since fallen a long way below that, which changes the conversation entirely. Check current listings, because the value case reads very differently in 2026 than it did at launch.

The headline spec, and what feeds it

LG specifies a 27-inch WOLED panel at 2560 x 1440, 480Hz maximum refresh, and 0.03ms GtG response, with peak brightness rated up to 1,300 nits and 98.5% DCI-P3 coverage. The connectivity story is the real news: one DisplayPort 2.1 input carries the full 480Hz signal with bandwidth to spare, alongside a pair of HDMI ports, three USB 3.0 ports, and a headphone output with DTS Headphone:X. That DisplayPort 2.1 headroom is why this panel does not need the compressed-bandwidth workarounds earlier high-refresh OLEDs leaned on. Our refresh rate guide explains who actually benefits from the 400Hz-plus tier — the short version is players whose GPUs hold extreme frame rates in esports titles.

Panel tech: WOLED, not QD-OLED

This is LG’s WOLED, not the Samsung-manufactured QD-OLED used by Dell and MSI in the same class. Both are OLED, so both deliver near-instant pixel response and per-pixel blacks; they differ in subpixel layout and in how blacks hold up under ambient light. RTINGS’ long-running comparison work on 27-inch OLEDs shows these trade-offs are real but subtle — panel-type fundamentals are covered in our IPS vs OLED vs TN breakdown. On paper, the 1,300-nit peak rating and VESA DisplayHDR True Black 400 certification put the 27GX790A at the bright end of its class for HDR highlights.

Adaptive sync and ergonomics

LG ships the panel with NVIDIA G-Sync Compatible, AMD FreeSync Premium Pro, and VESA Adaptive Sync certification — every major VRR path is covered, and our G-Sync vs FreeSync explainer explains what the badges actually change. The stand handles 110mm of height adjustment plus tilt, swivel, and pivot, with VESA 100x100 mounting for arms. LG’s regional warranty terms for UltraGear OLEDs vary by market, so verify burn-in coverage for your region before purchase rather than assuming it matches Dell’s written policy.

Positioning against the field

The Alienware AW2725DF is the obvious QD-OLED rival: 360Hz rather than 480Hz, a lower rated brightness ceiling, and Dell’s written burn-in warranty behind it. The BenQ Zowie XL2566K serves the opposite school — backlight-strobed TN clarity for players who prefer strobing to OLED image quality. The 27GX790A’s case is the combination: OLED picture, 480Hz speed, and DisplayPort 2.1 bandwidth none of the 360Hz class carries.

The bottom line

The 27GX790A is the fastest OLED you could put on a desk for most of its life, and the only one with native DisplayPort 2.1 bandwidth. At its launch price it was a specialist’s indulgence; at current street pricing it is one of the strongest performance-per-dollar cases in the OLED market — provided your frames can chase 480.