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Razer Viper 8KHz Review: 8000 Hz Gaming Mouse to Eliminate Latency

The Razer Viper 8KHz mouse is the first to operate at 8000 Hz (or 8 kHz). This is an exchange frequency with the computer eight times higher than that of traditional mouse (1000 Hz). Based on the classic Razer Viper, it is also exceptionally lightweight at 71 grams. This makes it ideal for competitive gaming (e-sports) and operates via a wired connection (USB). With the Hyperpolling technology of the Viper 8KHz, Razer increases the exchange frequency with the computer from 1000 Hz to 8000 Hz with the aim of eliminating the arch-nemesis of competitive gamers: latency.

Technical Specifications of Razer Viper 8KHz

Feature Specification
Sensor Optical
Wireless/Charging Base Yes / No
Power Source USB
Max Resolution 20000 dpi
Transmission Speed N/A
Price US$49.99


After having long participated—like almost all manufacturers—in the race for mouse boasting the highest sensor sensitivity, reaching values as high as 20,000 DPI. Razer now aims to revolutionize the speed of data transmission between the mouse and the computer. Set at 1000 Hz for gaming mouse for several years now, this polling rate allows, in theory, to reduce latency to a minimum of 1 ms, which is already very fast.

Nevertheless, Razer is taking it a step further with its Hyperpolling technology, promising nothing less than 8000 Hz! The Razer Viper 8KHz is the first mouse to benefit from this and clearly targets competitive players who require the highest possible responsiveness. Viper 8KHz is priced at US$49.99.

Related: Razer Naga V2 Pro and Naga V2 HyerSpeed Gaming Mouse

Razer Viper 8KHz Ergonomics

Lightness without Compromising Comfort

The Viper 8KHz is nothing but an enhanced version of the Viper. It features the same understated yet easily recognizable design characteristic of a Razer mouse. The grainy matte black plastic of the shell blends seamlessly with the glossy black plastic separating the two main buttons. The result is quite elegant, especially considering the flawless assembly quality. The lightweight nature of this model, weighing in at only 72g on the scale (71g as advertised, excluding the cable, which is 2g more than the classic Viper), allows for excellent maneuverability.

Razer Viper 8KHz

The well-curved sides, along with their elastomeric coating, enhance grip, making it easy to execute broad and swift movements and lift the mouse to reposition it on the pad. The glide is also excellent, thanks to the two large PTFE pads, especially on textile-coated pads. Naturally, the presence of a cable restricts the mouse’s movements a bit compared to a wireless mouse, but the highly flexible Speedflex cable (1.8m) of the Viper 8KHz is easily forgotten.

Razer Viper 8KHz

Secure Grip

In addition to a good grip, the Viper provides a comfortable fit for the hand despite its compact size (126.7 x 57.6 x 37.8 mm), which may not necessarily encourage placing the entire palm on it. As a mouse designed for fast-paced games (such as FPS), it is preferably used with fingertip control for greater agility. The fingers remain well-centered on the main buttons, which are curved for this purpose.

Razer Viper 8KHz

Razer Viper 8KHz Optical Switches for Greater Responsiveness

These buttons benefit from optomechanical switches known for their high reactivity, as their activation occurs through the interruption of a light beam, replacing the usual metal contact — which involves signal processing and leads to higher latency. The reliability has also improved, now guaranteeing up to 70 million activations.

Razer Viper 8KHz

However, it’s worth noting that the activation force of the buttons on the Viper 8KHz is not the lowest, with those on its Logitech counterpart, the G Pro Wireless, being even more sensitive. Both mouse, however, use small springs that hold the main buttons on the switches and reduce the necessary activation force. In general, the buttons on the Viper are a bit stiffer. Nevertheless, this doesn’t significantly impact performance; it primarily boils down to personal preference.

Razer Viper 8KHz

Unfortunately, it’s a less commendable story for the side buttons, which protrude only slightly from the shell. This was a deliberate choice to maintain the ambidextrous nature of the mouse and prevent inadvertent activations, but it does require a bit more effort from the thumb.

However, we conclude on a positive note with a well-indented scroll wheel that remains fairly discreet even when scrolled quickly during office use. The associated switch is equally convincing.

Related: Review of Razer DeathAdder V2 Pro


Cutting-Edge Optical Sensor of Razer Viper 8KHz

In contrast to the classic Viper, which features a “5G” sensor, the Viper 8KHz aligns itself with the Viper Ultimate by adopting the latest Focus+ sensor from the manufacturer. While not revolutionary, it boasts impeccable optical performance. Capable of withstanding accelerations up to 50g and operating at speeds of up to 16.51 m/s.

Razer Viper 8KHz

These capabilities far exceed what is necessary, even for the fastest players, exemplified by its 20,000 DPI sensitivity, which current screens cannot fully utilize (even in a multi-screen 4K setup). Nevertheless, it is a delight to have such a sensor that ensures flawless tracking (with an advertised precision of 99.6%) and optimally leverages the Hyperpolling technology introduced in this Viper 8KHz.

The Gains of 8000 Hz are Hardly Palpable

The true innovation lies in the exchange frequency between the mouse and the computer. It can now reach 8000 Hz, eight times that of the Viper. In other words, it’s about accelerating the transmission of information to the computer to minimize latency, theoretically down to 1/8th of a millisecond (0.125 ms). However, in practice, we’re talking about gains less than 1 ms.

Considering that current gaming screens mostly display a maximum of 144 Hz, equating to one frame every 7 ms, and that we’ve only recently seen a few 360 Hz monitors (2.8 ms), it’s clear that the mouse is not the weak link in the latency chain.

Razer Viper 8KHz

However, it’s worth noting that the Razer Viper 8KHz is indeed the most responsive mouse we’ve tested to date, even though it’s quite challenging to discern a difference between operating at 1000 Hz and 8000 Hz outside of specialized testing tools. We can confidently say that any micro-stuttering, those small image shifts that can occur when the delay between two mouse positions is irregular, is completely eliminated.

Nevertheless, caution is warranted regarding the CPU utilization that comes with such an operational frequency. While it remains low on a modern processor, it’s not negligible and can impact the smoothness of resource-intensive CPU games. Therefore, it’s advisable to revert to 1000 Hz in such cases.

Additionally, to truly benefit from the 8000 Hz, aiming for the highest possible display frequency (ideally 144 Hz or even higher on monitors capable of reaching 360 Hz) is essential. This, apart from requiring a good graphics card, demands a robust processor as well. In other words, it’s best suited for games that aren’t overly demanding on CPU resources and require a solid configuration.

Related: Razer DeathAdder V3 Pro Review

Pros and Cons of Razer Viper 8KHz


Flawless Responsiveness.

Fast and Accurate Optical Sensor.


Good Grip.

Truly Ambidextrous: 2 buttons on each side.

Flexibility of the USB cable.


Side buttons may not be easy to actuate.

Sensitivity change button under the mouse.

The benefit of 8000 Hz is not very evident.

Razer Viper 8KHz Review Conclusion

Genuinely highly responsive, the Razer Viper 8KHz achieves its goals but struggles to assert its superiority in practice. The improvement associated with the switch to an 8000 Hz frequency is expressed in milliseconds, which will remain imperceptible for many players compared to a classic Viper operating at 1000 Hz. So, no groundbreaking revolution, but a mouse that competitive players can rely on.

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