Razer Viper Ultimate Mouse Review

Tested using Methodology v1.0
Updated Dec 21, 2020 at 05:38 pm
Razer Viper Ultimate Picture
8.1
Office/Multimedia
8.7
Video Games (FPS)
8.2
Video Games (MMO)
8.7
Ultra-Light Gaming
7.6
Travel
Connectivity Wireless
Type
Standard

The Razer Viper Ultimate is an amazing gaming mouse that's very versatile and handles anything you throw at it. Its performance is excellent and the latency is extremely low, whether you use it wired or wirelessly. It has an ambidextrous design with two side buttons on each side, giving you plenty of programmable options. It feels durable, well-built, and remarkably comfortable, with a low back and rather short body. Its smaller size lends itself well to a fingertip grip, but small and medium-sized hands will also find it comfortable with a palm or a claw grip. It also comes with a unique charging station that acts as a receiver range extender for better performance.

Our Verdict

8.1 Office/Multimedia

The Razer Viper Ultimate Wireless is great for office use. It feels very well-made, is remarkably comfortable, and has an ambidextrous design with buttons on both sides. Its dedicated USB receiver also works as a charging dock, with RGB lighting that changes colors to let you know its battery level. You can reprogram every button according to your preferences, and set a HyperShift button to create a second layer of customized inputs if needed.

Pros
  • Well-built and almost universal design for all.
  • Buttons and settings are easily customizable.
  • Comfortable, ambidextrous design.
Cons
  • Not recommended for very large hands.
  • Only small and medium hands can use it with a palm grip.
8.7 Video Games (FPS)

The Razer Viper Ultimate is excellent for FPS games. The click latency, whether wired or wireless, is amazing, and even competitive gamers shouldn't notice any delay. It's also quite light, even if it doesn't have a honeycomb pattern. Its performance is excellent, and it's pretty consistent, especially when moved at fast speed. Most people should find it comfortable in a fingertip grip, but larger hands might have some issues with a palm or claw grip. It offers multiple customizable buttons, with two side buttons on each side.

Pros
  • Well-built and almost universal design for all.
  • Buttons and settings are easily customizable.
  • Very low latency, wired or wireless.
Cons
  • Not recommended for very large hands.
  • Only small and medium hands can use it with a palm grip.
8.2 Video Games (MMO)

The Razer Viper Ultimate is great for MMO games. It has a good amount of programmable buttons, although not as much as some dedicated MMO mice, which have a full side panel. Nevertheless, it has amazing performance and customization options. Its shape and size are better suited for a fingertip grip with almost any hand-size, and larger hands may find it uncomfortable with a palm or claw grip.

Pros
  • Well-built and almost universal design for all.
  • Buttons and settings are easily customizable.
  • Very low latency, wired or wireless.
Cons
  • Not recommended for very large hands.
  • Only small and medium hands can use it with a palm grip.
8.7 Ultra-Light Gaming

The Razer Viper Ultimate is excellent for ultra-light gaming. If you're looking for a very light mouse that doesn't have a typical honeycomb pattern design, this is a great option. It's lightweight, well-built, and has amazing performance which you can customize to your preference in the software. The latency, even wireless, is amazing and it feels very responsive.

Pros
  • Well-built and almost universal design for all.
  • Buttons and settings are easily customizable.
  • Very low latency, wired or wireless.
  • Fairly lightweight.
Cons
  • Not recommended for very large hands.
  • Only small and medium hands can use it with a palm grip.
7.6 Travel

The Razer Viper Ultimate is good for traveling. It isn't too tall and should fit in most laptop cases. It also has a built-in receiver slot, so you don't need to carry around its cable, making it great for working in tight spaces like on a plane.

Pros
  • Well-built and almost universal design for all.
  • Buttons and settings are easily customizable.
  • USB receiver storage within battery compartment.
  • Fairly lightweight.
Cons
  • Not recommended for very large hands.
  • Only small and medium hands can use it with a palm grip.
  • 8.1 Office/Multimedia
  • 8.7 Video Games (FPS)
  • 8.2 Video Games (MMO)
  • 8.7 Ultra-Light Gaming
  • 7.6 Travel
  1. Updated Dec 21, 2020: Updated review for accuracy and clarity.
  2. Updated Nov 20, 2020: Adjusted the build quality score.
  3. Updated Oct 05, 2020: Fixed an error with the number of programmable inputs.
  4. Updated Oct 05, 2020: Converted to Test Bench 1.0.
  5. Updated Jun 15, 2020: We've retested the sensor performance on the mouse's software version 1.02.
  6. Updated Dec 20, 2019: Converted to Test Bench 0.8.1.

Test Results

perceptual testing image
Design
Design
Style
Lighting Color RGB

The Razer Viper Ultimate has a fairly aggressive style, but with a nice, high-end gaming feel to it. The logo at the back is RGB-lit. It has an ambidextrous design with a low back. It comes with a proprietary charging cradle that's also RGB-lit at its base. You can either set the logo and the base to have the same lighting or individually assign them inside the software.

Design
Shape
Length 5.0" (127 mm)
Height 1.5" (38 mm)
Width 2.6" (66 mm)
Grip Width
62 mm
7.6
Design
Portability
Volume
19.47 Cu. Inch (319 Cu. centimeter)
Cable/Receiver Storing
Yes

The Razer Viper Ultimate is quite portable thanks to its design. It isn't too high, so you'll be able to toss it in a laptop bag without too much trouble. It also has a receiver storing slot under the mouse, so it's quite easy to bring it around without having the clutter of a cable.

Design
Weight
Maximum Weight With Wire
109 g
Maximum Weight Without Wire
75 g
Minimum Weight Without Wire
75 g
Weight Distribution
Centered
Extra Weights
No

Without its cable, the Razer Viper Ultimate is very light. It's one of the lightest wireless mice we've tested, and despite not having a honeycomb pattern design, it compares itself to some traditional ultra-light gaming mice, like the Glorious Model O Wireless.

8.0
Design
Build Quality

Update 11/20/2020: The left and right buttons squeak when you press them all the way down. We reduced the build quality score from 8.5 to 8 because of it.

The Razer Viper Ultimate's build quality is great. Although it's very lightweight and entirely made out of plastic, it feels durable and well-built. There's no wobble or gaps, but the left and right buttons squeak when you press them all the way down. The clicks feel sturdy and slightly different than what you get on most mice, which is probably due to the optical switches.

9.0
Design
Comfort Of Use
Right-handed
No
Left-handed
No
Ambidextrous
Yes
Coating
Matte
Finger Rest
No

The Razer Viper Ultimate is very comfortable. It has a true ambidextrous design with two side buttons on each side of the mouse. These buttons are also slightly further back on the mouse, which makes them more reachable than the G-Wolves Hati or the Glorious Model O. Since it doesn't have a high back, it's great for a fingertip grip, but it's not the best for bigger hands with a palm grip. If you prefer a right-slanted design rather than an ambidextrous one, check out the Razer Basilisk Ultimate or the Basilisk X Hyperspeed for a cheaper alternative.

Design
Palm Grip: Hand Size Recommendation
Small Hand
Yes
Medium Hand
Yes
Large Hand
No
X.Large Hand
No

Due to its low-back design and fairly short body, the Razer Viper Ultimate is better suited for small and medium hands for a palm grip. People with larger hands won't feel as comfortable and their fingers might go past the two main click buttons.

Design
Claw Grip: Hand Size Recommendation
Small Hand
Yes
Medium Hand
Yes
Large Hand
Yes
X.Large Hand
No

With a claw grip, only people with extra-large hands will find it to be too small. When curling up your fingers, even large hands should feel comfortable controlling this mouse.

Design
Fingertip Grip: Hand Size Recommendation
Small Hand
No
Medium Hand
Yes
Large Hand
Yes
X.Large Hand
Yes

The Razer Viper Ultimate's design lends itself very well to the fingertip grip. Most people, other than some with very small hands, should have nice control over it using this grip.

7.0
Design
Wireless Versatility
Bluetooth
No
Receiver
Yes
Battery Type
Rechargeable
Use When Charging
Yes
On/Off Activation
Auto Off And On/Off Switch
Receiver Extender
Yes
Battery Indicator Yes

The Razer Viper Ultimate comes with a dedicated USB receiver to connect to your PC wirelessly. You can either put it inside the cradle, which acts as an extender, or plug it in directly into your PC. The dock can also give you information regarding your mouse battery.

8.5
Design
Cable
Cable Length 6.0 ft (1.8 m)
Cable Type
Paracord-like
Permanent Kink
No
Port Type: Mouse End
Micro USB
Port Type: PC End
USB

The Razer Viper Ultimate's cable is an improvement over older Razer products. It feels very similar to the Glorious Model O's cable. It's light, doesn't hold as many kinks, and feels better-made. It doesn't create any drag when moving it around, which is great. If you don't want a charging cradle and simply want this mouse in a wired design, check out the Razer Viper.

9.0
Design
Mouse Feet
Gliding Experience
Very Good
Material
Virgin Grade PTFE
Extra Included
No

The feet are remarkable. Theyโ€™re made of virgin grade PTFE and provide a very smooth gliding experience on a desk or mousepad. Their thickness is pretty standard, but their shape could bother some people as they arenโ€™t as round as other mice. It doesn't come with extra feet in the box, but you should be able to find some third party ones quite easily.

Design
In The Box

  • Razer Viper Ultimate mouse
  • USB receiver
  • Charging cradle
  • USB to micro-USB cable
  • Manuals

Control
Control
Sensor Specifications
Sensor Technology
Optical (LED)
Sensor Model
Focus+
Works On Glass
No
Minimum CPI (DPI)
100 CPI
Maximum CPI (DPI)
20000 CPI
CPI (DPI) Adjustment Steps
50 CPI
CPI (DPI) Variation
6 %
Minimum Lift Off Distance
1.2 mm
Maximum Polling Rate
1000 Hz

The Razer Viper Ultimate's sensor has a very wide CPI range and you can adjust the sensitivity in small increments. The set CPI is pretty consistent, whether you move your mouse slowly or quickly. You can adjust the polling rate to 125Hz, 500Hz, or 1000Hz, and the lift-off distance is small enough that the sensor shouldnโ€™t track your movement when you're repositioning your mouse. If you like its shape but want something wired with an 8000Hz polling rate, check out the Razer Viper 8KHz.

8.3
Control
Buttons
Buttons Activation
Optical And Mechanical
Total Number Of Buttons
8
Number Of Side Buttons
4
Number Of Programmable Inputs
18
Profile Switching Button
Yes
CPI (DPI) Switching Button
Yes
Gesture Support
No

The Razer Viper Ultimate has a great number of buttons, including two additional ones on each side. You can reprogram every button to whatever you like, even the scroll up and down. You can even reassign the left click, as long as the left click action is assigned to another button. You can also set a HyperShift button, which enables another layer of programmable inputs, increasing your customization possibilities.

Control
Mouse Wheel
Scroll Wheel
Notched Wheel
Scroll Wheel Steps
24 Steps
Scroll Wheel Tilt
No
Thumb Wheel
No
Thumb Wheel Steps
No Thumb Wheel

The Razer Viper Ultimate's scroll wheel is pretty standard compared to other gaming mice. Its incremented design offers great feedback that feels good while gaming but isn't ideal for fast scrolling through long documents.

Control
Noise
Click Noise
Loud

The mouse clicks are loud, but they shouldn't disturb people around you unless you're in a very noise-sensitive environment.

8.7
Control
Click Latency
Click Latency: Receiver
9 ms
Click Latency: Bluetooth
N/A
Click Latency: Wired
7 ms

The Razer Viper Ultimate's click latency, both wired and wireless, is amazing, and even most competitive gamers shouldn't notice any delay when playing.

Operating System And Software
8.0
Operating System And Software
Compatible Software Option
Software Name Razer Synapse 3
Software Windows Compatibility
Yes
Software macOS Compatibility
No
Account Needed
No
On-Board Memory
Yes
CPI (DPI) Adjustment
Yes
Polling Rate Adjustment
Yes
Profile Configuration
Yes
RGB On/Off
Yes

The Razer Synapse 3 software is great and very user-friendly. You can easily customize most aspects of the mouse through it, and you can save your settings on the onboard memory, meaning you won't have to download the software on another computer when switching devices. Unfortunately, it's not available on macOS.

8.3
Operating System And Software
Mouse Compatibility
Windows Compatibility Fully
macOS Compatibility Partially

This mouse is fully compatible with Windows, but unfortunately, some buttons won't work on macOS. When setting the mouse in 'right-handed mode' on Mac, you can't use the right side buttons properly. Also, the rest of the buttons are set to their default settings, and can't be changed.

Differences Between Sizes And Variants

While we tested the black version that includes a charging dock, the Razer Viper Ultimate is also available in Quartz Pink, Mercury White, or a Cyberpunk 2077 version, which is a bright yellow with black outlines. You can also choose to buy it without the charging dock, though this option is only available in black.

Compared To Other Mice

The Razer Viper Ultimate is an amazing wireless gaming mouse that comes with a unique charging dock and has an amazingly low click latency, whether you use it wired or wirelessly. It’s among the most comfortable mice we’ve tested and is also one of the few that have a truly ambidextrous design, with two additional buttons on each side. The cable is much better than the one included with previous Razer mice. For other options, see our recommendations for the best mouse, the best wireless gaming mouse, and the best FPS mouse. If you're interested in Razer products, also check out the best Razer mice.

Logitech G PRO X SUPERLIGHT

The Logitech G PRO X SUPERLIGHT and the Razer Viper Ultimate are both amazing wireless gaming mice. If you're a fan of ultra-light mice, the Logitech is worth considering as it's among the lightest wireless mice we've ever tested. It also has a wider CPI range and is fully compatible with Mac, which the Razer isn't. However, the Razer is still very lightweight, has two programmable buttons on each side, and feels more comfortable to use than the Logitech.

Logitech G Pro Wireless

The Razer Viper Ultimate is a slightly better mouse than the Logitech G Pro Wireless. It has a few more programmable buttons and its cable, if used wired, is noticeably lighter and less cumbersome. The design of the Razer is also more comfortable. On the other hand, the Logitech is a bit more versatile since it is fully compatible with macOS, which the Razer isn't.

Razer DeathAdder V2 Pro

The Razer DeathAdder V2 Pro and the Razer Viper Ultimate are very similar performance-wise. The main difference is that the V2 is a right-handed mouse, while the Ultimate is fully ambidextrous. The Ultimate is lighter; however, the V2 has Bluetooth capability and a multi-device pairing feature.

Glorious Model O Wireless

The Razer Viper Ultimate is slightly better than the Glorious Model O Wireless for all uses. The Razer feels more comfortable, has many more programmable inputs, and has lower click latency. However, the Glorious is marginally lighter and feels better-built. While those with smaller hands will likely find the Razer more comfortable with most grip types, the Glorious is better suited for larger hands.

Razer DeathAdder V2

The Razer Viper Ultimate and the Razer DeathAdder V2 are similarly performing mice for FPS gaming. The Ultimate is wireless and a little bit lighter, while the V2 is wired. The Ultimate's click latency is excellent and almost as low as the V2, even when used wirelessly. The V2 is a better mouse for a palm grip, as it's suitable for any hand size with this grip type, while the Ultimate is better in fingertip grip for those with larger hands.

Glorious Model O

The Glorious Model O and the Razer Viper Ultimate are both great ultra-light gaming mice. The Model O is a bit lighter thanks to its honeycomb design, but the Razer is also impressively lightweight considering it's a wireless mouse. If you have small hands, you may find the Glorious a little bit too large, while the Razer may be more comfortable. Both have impressively low latency and a wide adjustable CPI range.

Razer Basilisk Ultimate

The Razer Viper Ultimate and the Razer Basilisk Ultimate are very similar gaming mice. They're both basically the same mouse internally, but have a different shape and design to them. The Basilisk Ultimate is a right-handed mouse with a thumb rest and has an additional sniper button on the left side. While the Viper Ultimate isn't recommended with all grip types for larger hands, the Basilisk Ultimate can be used comfortably with all grip types with anyone except those with very small hands.

Razer Viper Mini

The Razer Viper Ultimate is a slightly better gaming mouse than the Razer Viper Mini. The Mini is wired-only, while the Ultimate can be used wired or wirelessly. The Ultimate is slightly more comfortable due to its larger size, has more programmable buttons, and has a wider and more adjustable CPI range. While the Ultimate may be better for people with larger hands, smaller hands will likely get a better grip with the Mini, especially if using a fingertip grip.

Razer Viper

The Razer Viper and Razer Viper Ultimate are nearly identical. The Ultimate is wireless, while the Viper is wired-only. The Viper is a few grams lighter than the Ultimate; other than that, they're pretty much the same. You get a nice RGB charging cradle with the Ultimate, and the USB charging cable is a bit more flexible.

Glorious Model D

The Razer Viper Ultimate is an amazing FPS gaming mouse, while the Glorious Model D is an excellent choice for ultra-light gaming. The Razer has an ambidextrous design with two side buttons on each side and feels more solid and comfortable overall. It has a wider CPI range, a lower lift-off distance, and more programmable inputs. Also, it can be used wired or wirelessly with its USB receiver, making it quite versatile. That said, the Glorious is slightly lighter and features a honeycomb design with RGB strips. It’s well-suited for most hand sizes using any grip type.

Razer Viper 8KHz

The Razer Viper 8KHz and the Razer Viper Ultimate have the same ambidextrous body, but the Viper Ultimate is wireless, while the 8KHz is wired-only. Aside from some slight variances, like the 8KHz's slightly lower click latency and more consistent sensor, the biggest difference is the max polling rate. While the Ultimate caps out at 1000Hz, the 8KHz can be set as high as 8000Hz, which results in more fluid cursor movements, though we don't currently test this.

Logitech G502 HERO

The Razer Viper Ultimate is a noticeably better performing mouse than the wired Logitech G502 HERO. The Razer is better for a fingertip grip and glides very well. Its wireless design and low weight make it a great mouse for FPS games. It's very comfortable to use, but people with larger hands might prefer the Logitech, especially with a palm grip.

Razer DeathAdder Elite

The Razer Viper Ultimate is a better gaming mouse than the Razer DeathAdder Elite. Its wireless design gets rid of the clutter of a cable, and it's also noticeably lighter. Its click latency is lower and, when used wired, its cable is lighter than the Elite's. On the other hand, the Elite has a right-slanted design and is slightly better for people with larger hands.

Logitech G502 LIGHTSPEED

The Razer Viper Ultimate is a better FPS gaming mouse than the Logitech G502 LIGHTSPEED, but both are very good versatile mice. The Razer is smaller and much lighter, with an ambidextrous design that's well-suited for a fingertip grip, except if you have smaller hands. It has two side buttons on each side of its body, while the Logitech has an unlockable wheel and an additional sniper button on the side. The Logitech is very big and heavy, with an ergonomic design and a thumb rest. It should be better suited for people with larger hands.

Razer Mamba Elite

The Razer Mamba Elite is a wired gaming mouse, while the Razer Viper Ultimate is wireless. Both mice are lightweight, though the Ultimate is lighter. The Ultimate is mostly for people with small or medium hands, and those with very large hands will likely only find the Ultimate comfortable in fingertip grip, while the Elite can be used in all grip types by all hand sizes, except claw and fingertip grip with small hands. Both mice have low latency, a very wide CPI range, and two additional side buttons.

Logitech G703 LIGHTSPEED Wireless Gaming Mouse with HERO Sensor

The Razer Viper Ultimate is slightly better than the Logitech G703 LIGHTSPEED Wireless Gaming Mouse with HERO Sensor. The Razer is lighter, more comfortable to use, and has more programmable inputs. However, the Logitech has a lower CPI variation and software support for macOS.

BenQ ZOWIE S2

The BenQ ZOWIE S2 is a very different mouse than the Razer Viper Ultimate. The BenQ is a wired mouse, and it has a higher back hump, which might be better for claw grip users. On the other hand, the Razer is wireless, slightly lighter, and feels more high-end. If you were to use the Razer wired, its cable is better than the BenQ's. It also has RGB lighting that you can customize inside its software.

Razer Mamba Wireless

The Razer Viper Ultimate performs slightly better than the Razer Mamba Wireless. The Ultimate is smaller and lighter, and it has an ambidextrous design with two side buttons on each side. It's great for a fingertip grip, though small and medium hands should also find it comfortable with a palm or a claw grip. It has a wider CPI range, lower lift-off distance, and a lower click latency. On the other hand, the Mamba has more of an ergonomic shape, with a slight slant and a higher back. It’s well-suited for a palm and a claw grip unless you have smaller hands.

Logitech G903 LIGHTSPEED

The Razer Viper Ultimate is a better overall gaming mouse than the Logitech G903 LIGHTSPEED. It's lighter, more comfortable to use, and its sensor is amazing. It comes with a nice RGB charging station. On the other hand, the Logitech is a bit more versatile, thanks to its wheel's unlock button and the fact that it's fully compatible with macOS.

SteelSeries Aerox 3 Wireless

Although the SteelSeries Aerox 3 Wireless and the Razer Viper Ultimate both have an ambidextrous design, only the Razer has thumb buttons on both sides. The Razer is better overall due to its superior build, higher-quality feet, and lower click latency. It also has more buttons and more programmable inputs due to its HyperShift feature. However, the SteelSeries' honeycomb body is lighter, it has multi-device pairing, and its Engine 4 software is compatible with macOS.

Corsair HARPOON RGB Wireless

The Razer Viper Ultimate is a better gaming mouse than the Corsair HARPOON RGB Wireless. The Razer is lighter and has a much more comfortable and durable feeling. Both mice are only suitable for palm grip with small or medium hands. While the Corsair can be used by all hand sizes with a claw grip, people with extra-large hands will only get a comfortable grip of the Razer when using a fingertip grip. The Razer has a much wider and more adjustable CPI range, though the sensor on the Corsair is more consistent. The Razer has more programmable buttons, and its L/R click buttons are optical instead of mechanical.

SteelSeries Rival 3 Wireless

The Razer Viper Ultimate is a better gaming mouse than the SteelSeries Rival 3 Wireless. The Razer is more comfortable, has more precise CPI adjustment steps, and it has side buttons on both sides of the mouse, unlike the SteelSeries that only has them on the left side. However, the SteelSeries has Bluetooth, a slightly more consistent sensor, and is fully compatible with macOS, unlike the Razer.

Logitech G903 HERO

The Razer Viper Ultimate is better for most uses than the Logitech G903 HERO. The Razer has slightly lower click latency, is more comfortable, and has much better feet, so it glides better. However, the Logitech has a higher max CPI, less CPI variation, and the G HUB software is available on macOS, while the Razer Synapse 3 software isn't.

Razer Pro Click

The Razer Pro Click and the Razer Viper Ultimate perform the same overall; however, they're designed for different uses. The Pro Click is meant for productivity with multi-device pairing capability, and its scroll wheel has L/R tilt input. The Ultimate is much lighter and comes with a nice charging cradle. The Pro Click is designed for right-handed use, while the Ultimate is ambidextrous.

Logitech G403 Wireless Gaming Mouse

The Razer Viper Ultimate is a better mouse than the Logitech G403 Wireless Gaming Mouse. It's noticeably lighter and smaller than the Logitech, which is great for fast movements, it's low profile, and has an ambidextrous design. It's great for FPS players that use a fingertip grip, and it comes with a nice and sleek-looking charging dock, which also has RGB lighting. On the other hand, if you prefer a palm grip, the Logitech is a better option. Its software is also available on macOS, which isn't the case with Razer Synapse.

BenQ ZOWIE FK1-B

The Razer Viper Ultimate is a better gaming mouse than the BenQ ZOWIE FK1-B. The Razer is substantially lighter, despite being able to connect wirelessly with its USB receiver. It also has two additional side buttons, RGB lighting, better mouse feet, a wider CPI range, and a more finely adjustable CPI. The companion software is only compatible with Windows, but it has onboard memory that you can use to carry settings to computers without the software. It's well-suited to all grip types, depending on hand size. On the other hand, the BenQ doesn't have companion software for customization and only has two side buttons. That said, it's very well-suited to all grip types and nearly all hand sizes, but those with smaller hands may not be able to reach all buttons using a claw or fingertip grip.

SteelSeries Sensei Ten

The Razer Viper Ultimate is a better gaming mouse than the SteelSeries Sensei Ten. Both mice come with an ambidextrous design and two side buttons on each side, but the Razer has a more solid design and doesn't feel slippery. The Razer also comes with a unique charging station that also acts as a receiver range extender for better performance.

Alienware AW610M

The Razer Viper Ultimate is a much better wireless gaming mouse than the Alienware AW610M. The Razer is lighter, has a much better cable, a much lower click latency, better sensor performance, and more programmable buttons. While the Alienware is suitable for all hand sizes with a palm grip and larger hands for claw grip, the Razer is only usable with a fingertip grip if you have extra-large hands.

Corsair KATAR PRO Wireless

The Razer Viper Ultimate is a slightly better gaming mouse than the Corsair KATAR PRO Wireless. The Razer feels better built, has a wider and more adjustable CPI range, and more programmable buttons. However, the Corsair has Bluetooth support, uses one AA battery, and its software is compatible with macOS, although it's less user-friendly.

BenQ ZOWIE FK1+-B

The Razer Viper Ultimate is a better gaming mouse than the BenQ ZOWIE FK1+-B. The Razer connects wired or wirelessly with a USB receiver. It has lower latency, two additional side buttons, RGB lighting, a lower lift-off distance, a CPI with a much wider range that's adjustable in increments of 50, and software for customization. It's also well-suited to all grip types for most hand sizes, but those with larger hands may find their fingers drape over the front using a palm grip. On the other hand, the BenQ is a wired mouse with no wireless connectivity options. It's also significantly heavier and is well-suited for larger hands and all grip types.

VicTsing Wireless Gaming Mouse

The Razer Viper Ultimate is a much better gaming mouse than the VicTsing Wireless Gaming Mouse. The Razer is lighter, better for more hand sizes with a claw grip, has a significantly lower click latency, and a much better-performing sensor. The Razer has multiple buttons that can all be programmed within Razer's software, while the VicTsing doesn't have a companion software to make any customization.

J-Tech Digital V628X

The Razer Viper Ultimate is a much better-performing mouse than the J-Tech Digital V628X. The Razer performs better in every regard, though the J-Tech has a unique and customizable vertical design that may be more comfortable to some people after using it for extended periods.

Mad Catz R.A.T. 8+

The Razer Viper Ultimate is much better than the Mad Catz R.A.T. 8+. Despite being a wireless mouse, the Razer has much lower click latency. It also has an ambidextrous design, and it's lighter. However, the Mad Catz has less CPI variation, and it has an extra programmable button.

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