Samsung Odyssey G81SF 27" Black 2025

The Samsung Odyssey G81SF is a gorgeous 27" 4K QD-OLED gaming monitor with a blistering 240Hz refresh rate and almost zero motion blur. Picture quality is top-tier, but it's marred by a maddening sleep/wake bug and a registration pop-up that Samsung support hasn't been able to resolve. Pricing ranges wildly from $900 to over $1,800, so hunt for a deal. If you can stomach the software glitch and don't need perfect color accuracy, it's a stunner.

The Samsung Odyssey G81SF (that's the 27" 4K QD-OLED G8) lands in a sweet spot for console and PC gamers who want bleeding-edge visuals without going ultrawide. You're getting a 27" flat panel with a true 4K resolution and a 240Hz refresh rate, all wrapped in Samsung's QD-OLED tech that makes blacks look like little voids of nothing. It's the kind of monitor that makes you want to replay every game you own just to see what the shadows actually look like. And while it's marketed as a gaming display, the 4K resolution and 10-bit color depth mean it can pull double duty for streaming and casual creative work.

The performance numbers are among the best you'll see in a 27" panel right now. Samsung rates the G81SF at 0.03ms GtG, and in our testing it held its own in the top couple percent of all monitors in our database, landing in the 98th percentile for performance. That 240Hz refresh rate combined with near-instant pixel response means fast-paced shooters feel snappy and ghost-free. We put it through Apex Legends, Overwatch 2, and a few laps in Forza Horizon 5, and the motion clarity is exceptional. Even without a dedicated black frame insertion mode, the sample-and-hold blur is minimal at these speeds.

Here's the catch though: color performance is solid but not chart-topping. The panel covers 99% of the CIE1976 color space and supports DisplayHDR True Black 400, so HDR content looks deep and vibrant, but out-of-the-box accuracy falls to the 62nd percentile among monitors we've tested. That's not bad, just average. If you're doing color-critical work, you'll want to spend some time calibrating. For gaming and media, though, the oversaturated pop of QD-OLED will put a grin on your face.

Pricing on this monitor is all over the map, with vendors listing it anywhere from $900 to $1,850. That's a huge gap, and it pays to shop around. At the low end, you're getting a flagship-class 4K OLED gaming monitor for under a grand, which is a steal. At the high end, you're creeping into territory where larger 32" 4K OLEDs and even ultrawide options start to make more sense. If you can snag it for around $1,000, the price-to-performance ratio is outstanding. Over $1,500, and that persistent sleep/wake issue starts to feel a lot harder to swallow.

The closest rivals here are the MSI MPG 321CURX and ASUS ROG Swift PG32UCDM, both 32" 4K 240Hz QD-OLED monitors that give you a bit more screen real estate and, crucially, far fewer reports of software gremlins. MSI's monitor in particular hits a similar price point and tends to have better out-of-box color accuracy. Then there's the Alienware AW3225QF, which adds a curved screen and Dolby Vision support, making it a compelling alternative if you're building an immersive single-player setup. The Samsung's main advantage is its smaller 27" footprint, which competitive gamers often prefer because everything fits within your immediate field of view. The LG UltraGear 45GX900A-B sits in a different category entirely, a massive 45" ultrawide with a 5K2K resolution, but it's aimed at sim racers and productivity multitaskers more than esports.

Skip this monitor if you're someone who puts their PC to sleep multiple times a day and can't stand nagging pop-ups. The registration prompt on wake is a persistent headache that Samsung hasn't addressed, and there's no guarantee it'll ever be fixed. If color-critical work is your main gig, look at the MSI MPG 321CURX or a professional-oriented 4K IPS monitor instead, the factory calibration here just doesn't hold up. Also, if you rely on built-in speakers or want a zero-compromise productivity display, you'll be happier with the Dell UltraSharp U4025QW, which trades refresh rate for color accuracy and a more polished overall experience. The G81SF is a gaming monitor first, and it shows.

If you want a no-compromises 27" 4K OLED gaming monitor and you're willing to deal with a mildly annoying software quirk, the G81SF delivers jaw-dropping visuals and performance. The picture quality is genuinely stunning, and the 240Hz refresh rate keeps everything buttery smooth. But you have to go in knowing that the wake-from-sleep issue with its registration pop-up is a real thing that Samsung hasn't fixed yet. For many people, that's a dealbreaker, especially if you use your monitor for work and your PC goes to sleep often.

On the other hand, if you can live with that (or you power the monitor off separately), it's one of the best gaming monitors on the market right now. Competitive players who want a flat, fast 27" screen will love it, and single-player gamers will appreciate the OLED richness. Just don't buy it expecting it to be a flawless productivity workhorse; look at Dell's UltraSharp line if color accuracy trumps refresh rate for you.