4K OLED gaming monitors are the best panels money can buy right now, and these two are the top contenders at 27 inches. Both have true OLED panels, sub-millisecond response times, and excellent HDR. Samsung and LG each use their own OLED panel technology, and those differences matter.
Samsung Odyssey OLED G8 (G80SD) 27"
The Samsung Odyssey OLED G8 (G80SD) edges ahead — its 4K 240Hz panel, built-in Smart TV hub with streaming apps, and slightly better peak brightness make it the more versatile choice. The LG UltraGear OLED is an excellent panel with a more focused gaming approach and strong RTINGS scores.
Specs Comparison
| Spec | Samsung Odyssey OLED G8 (G80SD) 27" | LG UltraGear OLED 27GR95QE-B |
|---|---|---|
| Panel Size | 27" | 27" |
| Panel Type | QD-OLED | WOLED |
| Resolution | 4K (3840×2160) | QHD (2560×1440) |
| Refresh Rate | 240 Hz | 240 Hz |
| Peak Brightness (HDR) | ~1000 nits | ~800 nits |
| Response Time | 0.03ms GtG | 0.03ms GtG |
| Smart TV Hub | Yes (Tizen) | No |
| Price | ~$1200 | ~$900 |
Panel Technology
The Samsung G80SD uses a QD-OLED (Quantum Dot OLED) panel — Samsung's own technology that adds a quantum dot layer on top of an OLED for wider color gamut and higher peak brightness. RTINGS measured the G80SD at about 1000 nits peak on a 10% HDR window.
The LG 27GR95QE-B uses LG's WOLED (White OLED) panel. RTINGS measured it at about 800 nits peak on similar windows. QD-OLED typically has a slight edge in peak brightness and color volume; WOLED is more consistent across the panel.
Gaming Performance
Both monitors have 0.03ms GtG response times — effectively instantaneous. At 4K 240Hz with DisplayPort 1.4 compression (or 4K 165Hz without compression), both deliver the smoothest motion you can currently get from a 4K display.
Both support NVIDIA G-Sync Compatible and AMD FreeSync Premium Pro. In practice, variable refresh rate works identically on both. Neither monitor has any edge in input lag either — both measure under 2ms at 240Hz.
Smart Features and Hub
The Samsung G80SD has a full Tizen Smart TV hub built in — Netflix, Disney+, Apple TV, Prime Video — accessible without a PC connected. It's genuinely useful as a standalone streaming device.
The LG 27GR95QE-B is a monitor-first device without smart TV features. It's simpler and arguably cleaner from a software bloat perspective.
Burn-in Considerations
Both monitors are OLED and carry the same burn-in risk caveat. Both include pixel refresher and screen-saver mitigation. RTINGS' burn-in test of QD-OLED panels over 9000 hours showed minimal image retention in a gaming usage pattern — reassuring, though neither manufacturer provides a burn-in warranty.
For gaming and media use (varied content), burn-in is unlikely to be an issue in normal use. Static UI elements left on screen for hours are more of a risk.
Samsung Odyssey OLED G8 (G80SD) 27" Strengths
- QD-OLED with ~1000 nits peak brightness
- 4K 240Hz refresh rate
- Built-in Tizen Smart TV hub
- Excellent color gamut (DCI-P3 coverage)
LG UltraGear OLED 27GR95QE-B Strengths
- Excellent RTINGS scores for gaming
- WOLED with consistent panel uniformity
- Clean software — no smart TV overhead
- Strong FreeSync and G-Sync support
Samsung Odyssey OLED G8 (G80SD) 27" Weaknesses
- Smart TV hub adds software complexity
- QD-OLED can show slight ABL (auto brightness limiting) on bright scenes
- Premium price
LG UltraGear OLED 27GR95QE-B Weaknesses
- Lower peak brightness (~800 nits vs 1000 nits)
- No smart TV features for standalone use
- WOLED slightly less vivid color volume than QD-OLED
Best For
- a: 4K gaming enthusiasts who also want a smart TV hub and brightest possible HDR
- b: Focused gamers who want excellent OLED performance at a lower price
FAQ
Does either monitor require a very powerful GPU for 4K 240Hz?
Yes — 4K 240Hz demands an RTX 4080 or RX 7900 XTX class GPU for triple-digit frame rates in modern games. Most setups will run 4K at 60–120 Hz in demanding titles.
Is OLED burn-in a real risk for gaming?
For varied gaming content, burn-in risk is low based on RTINGS' long-term testing. Static HUD elements (like mini-maps always in the same position) carry more risk. Both monitors include pixel refresh cycles to mitigate this.