LG
LG UltraGear 27GX790A-B
$999.99
Released 2024-09
Best Computer Monitors · head-to-head
LG UltraGear 27GX790A-B vs Gigabyte M27Q
A sourced, side-by-side comparison. Gigabyte M27Q is cheaper at $349.99. Every spec and price links to its source.
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Gigabyte
Gigabyte M27Q
$349.99Cheaper
Released 2021-03
Which is better: the LG UltraGear 27GX790A-B or Gigabyte M27Q?
The LG UltraGear 27GX790A-B wins 2 of the 2 specs we compare head to head; the other wins 0. The Gigabyte M27Q is the cheaper at $349.99. Get the LG UltraGear 27GX790A-B for the stronger spec sheet, the Gigabyte M27Q to spend less.
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Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | LG UltraGear 27GX790A-B | Gigabyte M27Q |
|---|---|---|
| US price | $999.99 | $349.99 |
| Brand | LG | Gigabyte |
| Released | 2024-09 | 2021-03 |
| Size (in) | 27 | 27 |
| Resolution | 2560x1440 | 2560x1440 |
| Panel type | OLED | IPS |
| Refresh (Hz) | 480 | 170 |
| Response ms | 0.03 | 0.5 |
| HDR | VESA DisplayHDR True Black 400 | VESA DisplayHDR 400 |
| Ports | 1x DP 2.1, 2x HDMI 2.1, 1x USB-B 3.0 (upstream), 2x USB-A 3.0 | 1x DP 1.2, 2x HDMI 2.0, 2x USB-A 3.0, 1x USB-C (DP Alt) |
| Adaptive sync | NVIDIA G-Sync Compatible, AMD FreeSync Premium Pro | AMD FreeSync Premium |
| Release | 2024-09 | 2021-03 |
Sources — LG UltraGear 27GX790A-B: newegg.com (verified 2026-06-15). Gigabyte M27Q: gigabyte.com (verified 2026-06-15).
What's the difference between the LG UltraGear 27GX790A-B and Gigabyte M27Q?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Panel type: LG UltraGear 27GX790A-B OLED vs Gigabyte M27Q IPS
- Refresh (Hz): LG UltraGear 27GX790A-B 480 vs Gigabyte M27Q 170
- Response ms: LG UltraGear 27GX790A-B 0.03 vs Gigabyte M27Q 0.5
- HDR: LG UltraGear 27GX790A-B VESA DisplayHDR True Black 400 vs Gigabyte M27Q VESA DisplayHDR 400
- Ports: LG UltraGear 27GX790A-B 1x DP 2.1, 2x HDMI 2.1, 1x USB-B 3.0 (upstream), 2x USB-A 3.0 vs Gigabyte M27Q 1x DP 1.2, 2x HDMI 2.0, 2x USB-A 3.0, 1x USB-C (DP Alt)
- Adaptive sync: LG UltraGear 27GX790A-B NVIDIA G-Sync Compatible, AMD FreeSync Premium Pro vs Gigabyte M27Q AMD FreeSync Premium
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
LG UltraGear 27GX790A-B
Only one whitelisted tester review (PCWorld, tested 2025-02-21) returned verifiable verbatim text and lab measurements for this exact model (27GX790A-B). All three quoted sentences and all four measured values (with units) were re-confirmed verbatim on the page. Candidate reviews from RTINGS, Tom's Hardware and Tom's Guide were excluded because their page bodies returned only navigation/no copyable text. PCWorld praises near-still-image motion clarity at 480Hz and per-pixel zero-nit contrast, but flags a distracting dirty-screen effect and pixelation around small fonts. (1 sourced review, 1 lab-tested.)
Praised: Motion clarity nearly as crisp as a still image at 480Hz; Exceptional contrast from per-pixel zero-nit black levels; Accurate out-of-box color (6400K vs 6500K target, gamma 2.2).
Flagged: Distracting dirty-screen effect (DSE) during use; Pixelation visible around small fonts and interface buttons; Modest SDR brightness (~250 nits sustained).
Gigabyte M27Q
Only one whitelisted lab review qualified: Tom's Hardware. It rates the M27Q a fast, high-value 170 Hz QHD IPS monitor with measured >400 nits brightness, 1,118.9:1 contrast, and an exceptionally low 22 ms input lag. Downsides: lackluster HDR and Aim Stabilizer ghosting. (1 sourced review, 1 lab-tested.)
Praised: Very low input lag (22 ms measured) and fast 170 Hz gaming performance; Strong value for the price; Large color gamut (over 100% DCI-P3) with accurate sRGB mode.
Flagged: Aim Stabilizer blur-reduction introduces significant ghosting; Lackluster HDR with no extra contrast in HDR mode; DCI-P3 red is slightly under-saturated.