Razer Viper 8KHz Ultralight Ambidextrous Wired Gaming Mouse: Fastest Gaming Switches - 20K DPI Optical Sensor - Chroma RGB Lighting - 8 Programmable Buttons - 8000Hz HyperPolling - Classic Black

Lightning-Fast Precision for Competitive GamingThe Razer Viper 8KHz is one of those mice that makes you immediately notice the difference the first time you plug it in. At just 71 grams, it feels incredibly light in the hand, which is perfect for long gaming sessions where fatigue can creep in. The ambidextrous design is thoughtful—I can comfortably use it in either hand, and the side buttons are well placed without being intrusive.What stands out most is the 8000Hz polling rate. Movements feel unbelievably smooth and responsive, especially in FPS games where quick flicks and micro-adjustments matter. Paired with the 20K DPI sensor, I had no trouble dialing in the sensitivity for both fast-paced shooters and more methodical strategy games. The Razer optical switches are crisp and actuate instantly—no double-click issues so far, and they feel much more reliable than traditional mechanical switches.The Chroma RGB lighting is understated but customizable enough to match the rest of my setup. I also appreciate the drag-free Speedflex cable, which keeps movement fluid without the tugging you sometimes get with other wired mice. One small watchout: to fully benefit from the 8000Hz polling, you’ll need a powerful PC and a high refresh rate monitor; otherwise, the gains won’t be as noticeable.Bottom line: If you’re serious about competitive gaming and want one of the fastest, most precise mice available, the Razer Viper 8KHz delivers in spades. It combines ultra-light comfort, rock-solid build quality, and lightning response times that give you a real edge in fast-paced play.

So I bought this Razer 8k used/like new, and I didn't know what to expect. I bought and returned multiple different mice before settling on this one, and after a couple of fails, I decided I'd go open box in case of more side buttons being unreachable or ergo shapes being uncomfortable, or whatever and having to return them. Anyway, I got this 8k for about $26. It arrived in resealed original packaging with no accessories or anything, which is fine at half price. It also came smelling like sanitized chemicals, and had tiny tannish food scraps or something in the rubberized side grip. A little rubbing alcohol and it was new again. After cleaning it, I used it for different things including web browsing, Android Studio, Blender, and Fortnite. The buttons have the greatest click I've ever felt, the scroll wheel is large and protrusive and has distinct notches as you roll it, which is made for FPS games like Fortnite, PUBG etc, for precise item selection, but would be annoying for some things which require smoother scrolling. The scroll click is easy and precise. . . the whole thing feels like a whole different level in feel and quality, from other mouse scroll wheels. I use the inside thumb buttons for jump and slide in Fortnite, and I disabled the left hand thumb buttons, which surprisingly, I don't feel, when my third finger rests there. I had to get used to the low profile of the thumb buttons, but once I adjusted to them, they actually work very well. Ergonomically, I prefer a hump towards the rear of the mouse, but my hand adjusted to that too. The 8k feature is wasted on me, because most lower-middle end PCs can't handle 8000 reports per second from the mouse, but the 1k setting is perfect. Everything from the PTFE skates to the Razer Focus+ sensor to the optical v2 switches is premium and frankly amazing for the price (which I paid half of.) Also, other than some of the $150ish Asus ROG mice, the Razer optical switch mice, like the Viper 8k, have hot-swappable switches, so if one of the top switches breaks, it's about $10-15 a pair to replace em and they just clip into place. . . no soldering. So, I really love this mouse, and I can't really recommend anything other than a Razer, after trying different mice. Its just different, unique and better. Apparently, from reviews I've seen, the other Razer mice have a smoother scroll wheel, for a less gamer specific, more universal functionality.

I bought this mouse around my birthday last year and at first it took me some time to adjust to the feeling of it because I had a Logitech g502 hero the past 2 years and ever since I switched to this mouse it feels like I can edit way faster on fortnite and the software is pretty great and like I said 8khz polling rate can seriously cause fps drops but it doesn't affect me that badly since I have a rtx 3070 ryzen 5 5600x and I keep a stable 240fps bug other than that this is my favorite mouse.

Everything about the mouse is great, but the well of the mouse wheel has too much space in it making it easy for a speck of dust or something to get into it. This causes the mouse wheel to bug out every few hours or so. The only reliable fix ive been able to find is just blowing into it and that usually fixes it. What happens is when i scroll up or down, it will jitter in both directions.