Razer likes to give the in-house mice as much speed as possible. After all, the Razer rodents are often and gladly used by professionals, for whom every millisecond counts. We average gamers usually don't notice any difference, but at least we are happy about continuously improved technology. With the Viper 8K, Razer is tackling a topic that has so far mostly gone unnoticed - namely the polling rate. It was pumped up from the usual 1,000 Hz to a whopping 8,000 Hz.

The polling rate basically means how often the mouse sends signals to the PC. At the currently commercial polling rate of 1,000 Hz, 1,000 signals are sent to the PC per second, which corresponds to a delay of one millisecond. Since the input delays between the mouse click and the display on the monitor add up, it is the goal especially for e-athletes to keep this delay as low as possible. An increase to 8,000 Hz corresponds to a reduction in the delay from 1 ms to 0.125 ms if everything runs smoothly.

The basis for this is a new USB micro-controller that enables this acceleration of the query rate, with appropriate adjustments so that the driver can process the flood of data at all. Razer calls this HyperPolling technology and is used for the first time in the Viper 8K. However, we cannot really understand this technically, we simply lack the measuring equipment. Especially in connection with the new, faster displays with 240 or even 360 Hz, the technology can be useful to minimize micro-stuttering or minimal jumps of the mouse pointer.

Let's just believe it. After all, the new technology does not ensure that the Razer Viper 8K becomes unaffordable, because with an MSRP of 89.99 euros it is still quite moderately positioned for a high-end gaming mouse. And that, although there is even more in the tiny 71 gram lightweight, because Razer has not spoiled and paid no attention to economy either with switches or with the sensor. The sum of the optimizations can be worthwhile for ambitious gamers.


It starts with the sensor, the optical Razer Focus + Optical Sensor with up to 20,000 DPI, which is currently one of the fastest sensors. Even if the maximum DPI range is hardly really used. Above all, it is the 99.9 percent resolution accuracy (according to the manufacturer) that is interesting for gamers. The sensor is already used in a number of other Razer mice and so far we have only had positive experiences with it across the board.

When it comes to the mouse button switches, too, Razer does not splash around and has installed the second generation of Razer Optical Switches. These have the advantage that the scanning takes place via a light barrier instead of a mechanical contact, which on the one hand increases the precision immensely, but on the other hand also reduces wear and the debounce delay is eliminated. All of this together reduces the input latency as much as is currently technically possible. Even the nimble PTFE sliding surfaces and the soft SpeedFlex cable are designed to eliminate disruptive elements when gaming. Surely everyone has struggled with rigid cables while gaming.

Razer is also player-friendly in terms of design. The Viper 8K is symmetrical and has thumb buttons on both sides and a rubberized surface for a secure grip. All keys can be assigned in the Synapse software, and the mouse can be operated in left or right-handed mode. It is a welcome fact that left-handers are not neglected this time either. At just 71 grams, the mouse is also extremely light. Only we didn't like the rubberized mouse wheel that much. The scroll resistance is great, but the click behavior of the mouse wheel was a bit too sensitive for us in the end. In the heat of the moment, it is very possible that you accidentally trigger a click.

Otherwise, the Viper 8K has all the usual features. Logo lighting with the Razer Chroma RGB system is just as natural as the configuration of the buttons, DPI settings, profiles, etc. in the Synapse software. Up to five DPI settings can be assigned, the corresponding switch is again on the underside of the mouse. Incidentally, at 126.73 mm (length) X 57.6 mm (width) X 37.81 mm (height), the Viper 8K is a medium size that pretty much everyone should be able to handle.


Lightning-fast mouse for ambitious players

Gentlemen, a lot has happened with the technology in the gaming mice. Faster, energy-saving sensors, optical switches, improved selection of materials, weight reduction and now also the long overdue improvement in the query rate. Normal gamers will hardly care, they will probably hardly notice it, but ambitious gamers and e-athletes aim to minimize every fraction of a second in latency and input delays. For this group of players in particular, the Razer Viper 8K is yet another step in the right direction.

In practice, however, it bothered us that the mouse wheel can occasionally generate a click when scrolling, because the switch under the mouse wheel is a little too sensitive. In a tournament, this can mean a quick virtual death, unless you have already got used to it or have deactivated the mouse wheel button assignment. However, that was the only small flaw of the Viper 8K. Otherwise a great piece for a very fair price.


  • fast query rate
  • strong sensor
  • soft cable
  • large PTFE sliding surfaces
  • optical switches with nice feedback
  • suitable for both left and right handers
  • good ergonomics
  • very easy


  • Mouse wheel a little too sensitive to clicks

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