Comparison · Monitors
LG 27GX790B vs Samsung Odyssey OLED G6: 540Hz tandem OLED or 500Hz QD-OLED?
The two fastest 1440p OLEDs you can buy. The LG is brighter, has DisplayPort 2.1 and USB-C, and adds a 720Hz mode. The Samsung often costs less and has the better stand.
Our pick: LG 27GX790B for brightness, ports, and its 720Hz mode; Samsung Odyssey OLED G6 if you find it cheaper and want a fully adjustable stand
LG
UltraGear 27GX790B
8.8$999.99 list
The more complete monitor: brighter in SDR, DisplayPort 2.1, USB-C, and a 720Hz dual mode for competitive shooters.
Pros
- • 540Hz native at 1440p, 720Hz at 720p
- • 335 nits full-screen SDR, 1,500 nits peak HDR (DisplayHDR True Black 500)
- • DisplayPort 2.1 (UHBR13.5) plus USB-C with DisplayPort Alt Mode
Cons
- • LG's burn-in warranty is two years
- • WOLED's RWBG subpixels can fringe text
- • Matte coating dulls blacks a little
Samsung
Odyssey OLED G6 (G60SF)
8.6$699.99 to $999
A Tom's Hardware Editor's Choice with excellent color and a full stand. Often the cheaper of the two.
Pros
- • 500Hz QD-OLED with 99% color gamut (CIE1976) per Samsung
- • Height, tilt, swivel, and pivot adjustment
- • Three-year warranty
Cons
- • DisplayPort 1.4 and no USB-C
- • 300 nits typical
- • QD-OLED's triangle subpixels fringe text and lift blacks in bright rooms
These are the two fastest 27-inch 1440p OLED gaming monitors on sale in the US. LG's UltraGear 27GX790B uses LG Display's fourth-generation tandem WOLED panel at 540Hz. Samsung's Odyssey OLED G6 (G60SF, sold as the S27FG60) uses Samsung Display's third-generation QD-OLED at 500Hz.
Specs here come from LG and Samsung via TFTCentral, Notebookcheck, TweakTown, and PCWorld, with Tom's Hardware's review for the G6's verdict. We have not tested either monitor.
Specs compared
| Spec | LG UltraGear 27GX790B | Samsung Odyssey OLED G6 (G60SF) |
|---|---|---|
| Panel | 4th-gen tandem WOLED (LG Display) | 3rd-gen QD-OLED (Samsung Display) |
| Size | 27-inch class (26.5-inch viewable) | 27-inch |
| Resolution | 2560 x 1440 | 2560 x 1440 |
| Refresh rate | 540Hz; 720Hz at 1280 x 720 | 500Hz |
| Brightness | 335 nits full-screen; 1,500 nits peak HDR | 300 nits typical; 1,000 nits peak |
| HDR certification | DisplayHDR True Black 500 | DisplayHDR True Black 500 |
| Video inputs | 2 x HDMI 2.1, 1 x DisplayPort 2.1 (UHBR13.5), USB-C (DP Alt Mode) | 2 x HDMI 2.1, 1 x DisplayPort 1.4 |
| Coating | Matte anti-glare | Anti-glare |
| Stand | Not detailed here; check LG's page | Height, tilt, swivel, pivot |
| Warranty | LG covers burn-in for 2 years | 3 years |
| Price | $999.99 list; $799.99 first discount (Feb 2026) | $999 launch; $699.99 at Samsung (Dec 2025) |
Speed: 540Hz vs 500Hz
Both are faster than almost any GPU can feed in modern games. The LG's real advantage is its dual mode: at 1280 x 720 it runs at 720Hz, which matters only to competitive players chasing motion clarity in games like Counter-Strike 2. At these refresh rates both monitors rely on Display Stream Compression over DisplayPort; the LG's DisplayPort 2.1 input leaves more bandwidth headroom than the Samsung's DisplayPort 1.4.
Brightness and HDR
The tandem panel is the LG's biggest strength. It is rated for 335 nits full-screen and 1,500 nits peak in HDR, against the Samsung's 300 nits typical and 1,000 nits peak. In a bright room, or with a lot of white web pages on screen, the LG holds up better.
Text, color, and coating
Neither panel uses the RGB stripe layout Windows text rendering expects. QD-OLED arranges subpixels in a triangle and WOLED uses red, white, blue, and green, so both can show colored fringes on small text. QD-OLED has no polarizer, so its blacks look slightly gray when room light hits the screen; the LG's matte coating trades a little black depth for fewer reflections. The Samsung's color volume is excellent: Tom's Hardware gave it an Editor's Choice for performance and color.
Which should you buy?
- Brighter room, Mac or laptop over USB-C, or you want 720Hz: LG 27GX790B.
- Cheaper on the day, or you need portrait mode and swivel: Samsung Odyssey OLED G6.
- Under $400 and fine with 180 to 240Hz: see our cheap OLED picks instead.
Questions we get
Is the LG 27GX790B better than the Samsung Odyssey OLED G6?
On paper, yes: it refreshes faster (540Hz vs 500Hz, plus a 720Hz mode at 720p), it is brighter in SDR and HDR, and it has DisplayPort 2.1 and USB-C. The Samsung wins on stand adjustability and, frequently, price. Both are top-tier 1440p OLEDs, so let the price on the day decide.
Can you see the difference between 500Hz and 540Hz?
Barely. Going from 500Hz to 540Hz shortens each frame from 2.0 ms to about 1.85 ms. You also need a GPU that holds 500-plus frames per second, which only happens in lightweight esports games like Counter-Strike 2 and Valorant at low settings.
What is the LG 27GX790B's 720Hz mode?
A dual mode that drops the resolution to 1280 x 720 so the panel can refresh at 720Hz. It is meant for esports players who value motion clarity over sharpness. At 27 inches, 720p looks soft, so most players will stay at 1440p and 540Hz.