Products
Razer Viper 8KHz
Logitech Signature M650
Tested using Methodology v1.5.1
Updated Aug 05, 2025 08:01 PM
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Amazon.com
Tested using Methodology v1.5.1
Updated Aug 05, 2025 07:43 PM
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Amazon.com
ConnectivityWired
Type
Standard
Default Weight
69.8 g
Ambidextrous
True Ambidextrous
ConnectivityWireless
Type
Standard
Default Weight
99.2 g
Ambidextrous
Shape Only
Our Verdict
Razer Viper 8KHz
Logitech Signature M650
The Razer Viper 8KHz and the Logitech Signature M650 are two very different mice. The Razer is a wired-only gaming mouse with a maximum polling rate of 8000Hz. Its click latency is much lower, and it has a much wider CPI range, within which you can precisely adjust the CPI in steps of 50. On the other hand, the Logitech is a wireless office mouse that connects via Bluetooth or its USB receiver. It's very quiet to use, and its software works on both Windows and macOS.
Variants
- Viper 8KHz (Black)
- Viper 8KHz (ESL Edition)
- Signature M650 (Black)
- Signature M650 (Graphite)
- Signature M650 (Off White)
- Signature M650 (Rose)
Check Price
Black
Viper 8KHz
SEE PRICE
Amazon.com
Black
Signature M650
SEE PRICE
Amazon.com
ESL Edition
Viper 8KHz
SEE PRICE
Amazon.com
Graphite
Signature M650
SEE PRICE
Amazon.com
Off White
Signature M650
SEE PRICE
BestBuy.com
Rose
Signature M650
SEE PRICE
BestBuy.com
Main Differences for
Work
Work
Threshold
Work
6.1
7.0
Wireless Versatility
0.0
9.2
Mouse Compatibility
8.3
10
Additional Buttons
8.0
5.9
Full Comparison
Design
Style
Style Picture
Type
Standard
Standard
Coating
Matte
Matte
Lighting Color
RGB
No Lighting
Shape
3D Model
Length
5.0" (127 mm)
4.2" (107 mm)
Width
2.6" (66 mm)
2.4" (61 mm)
Height
1.5" (38 mm)
1.5" (38 mm)
Grip Width
62 mm
52 mm
Ambidextrous
True Ambidextrous
Shape Only
Left-Handed Friendly
Yes
Yes
Finger Rest
No
No
Build Quality
8.0
8.0
Build quality picture
Weight
8.3
7.6
Minimum Weight Picture
Lowest Weight
69.8 g
79.2 g
Default Weight
69.8 g
99.2 g
Weight Distribution
Centered
Back-heavy
Extra Weights
No
No
Hand Size Recommendation
Palm Grip Hand Recommendation
Claw Grip Hand Recommendation
Fingertip Grip Hand Recommendation
Wireless Versatility
0.0
9.2
Maximum Of Paired Devices
Wired
2
Bluetooth
No
Yes
Receiver
No
Yes
Battery Type
No Batteries
1x AA
Use When Charging
No
No ( Single use batteries)
On/Off Activation
None
Auto Off And On/Off Switch
Receiver Extender
No
No
Receiver Storing
No
Yes
Battery Indicator
No
Yes
Cable
Connectivity
Wired
Wireless
Cable Length
5.9 ft (1.8 m)
N/A
Cable Type
Paracord-like
No Cable
Permanent Kink
Yes
No
Port Type: Mouse End
No Port
No Port
Port Type: PC End
USB-A
No Port
Mouse Feet
9.0
7.5
Mouse Feet picture
Gliding Experience
Very Good
Ok
Material
Virgin Grade PTFE
PTFE
Extra Included
No
No
In The Box
In the box picture
Control
Main Button
Actuation Graph
Force/Distances Graph
Switch Type
Optical
Mechanical
Switch Model
Razer Optical Mouse Switch Gen 2
Not Specified
Additional Buttons
8.0
5.9
Buttons Picture
Total Number Of Buttons
8
5
Number Of Side Buttons
4
2
Number Of Programmable Inputs
18
3
Profile Switching Button
Yes
No
Gesture Support
No
Yes
Click Latency
9.6
7.1
Latency Data
Expected Connection
2.1 ms
12.1 ms
Wired
2.1 ms
N/A
Receiver
N/A
12.1 ms
Bluetooth
N/A
14.4 ms
CPI
9.8
8.2
CPI Graph
SRAV Close-Up
SRAV @ 1600 CPI
-0.10%
1.98%
SRAV @ 800 CPI
0.00%
0.21%
SRAV @ 400 CPI
-0.17%
1.33%
SRAV @ Fixed CPI
N/A
N/A
Precision Error Between Speeds
0.32%
0.87%
Precision Error Between CPI
0.32%
0.69%
Worst Tracking Error
2.00%
3.44%
Minimum CPI
100 CPI
400 CPI
Maximum CPI
20,000 CPI
4,000 CPI
CPI Adjustment Steps
50 CPI
N/A
Sensor Latency
9.3
7.0
Sensor Latency Transition Graph
Delay To Start Of Movement
10.2 ms
22.4 ms
Delay At Half Movement
1.9 ms
13.8 ms
Delay To End Of Movement
3.4 ms
19.4 ms
Sensor Specifications
Sensor Technology
Optical (LED)
Optical (LED)
Sensor Model
Focus+
Logitech Advanced Optical Tracking
Works On Glass
No
No
Minimum Lift Off Distance
1.2 mm
1.2 mm
Maximum Polling Rate
8000 Hz
125 Hz
Mouse Wheel
Mouse wheel picture
Scroll Wheel Type
Notched Wheel
Notched Wheel
Scroll Wheel Tilt
No
No
Thumb Wheel Type
No
No
Noise
Noise Video
Click Noise
Quiet
Very Quiet
Operating System And Software
Configuration Software
Software Tour
Software Name
Razer Synapse 3
Logitech Options+
Software Windows Compatibility
Yes
Yes
Software macOS Compatibility
No
Yes
On-Board Memory
Yes
No
CPI (DPI) Adjustment
Yes
Yes
Polling Rate Adjustment
Yes
No
Profile Configuration
Yes
Yes
Profile Auto-Switching
Yes
Yes
RGB On/Off
Yes
No RGB
Mouse Compatibility
8.3
10
Windows Compatibility
Fully
Fully
macOS Compatibility
Partially
Fully
Check Price
Black
Viper 8KHz
SEE PRICE
Amazon.com
Black
Signature M650
SEE PRICE
Amazon.com
ESL Edition
Viper 8KHz
SEE PRICE
Amazon.com
Graphite
Signature M650
SEE PRICE
Amazon.com
Off White
Signature M650
SEE PRICE
BestBuy.com
Rose
Signature M650
SEE PRICE
BestBuy.com
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Razer Viper 8KHz
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Razer Viper 8KHz vs Logitech Signature M650: Main Discussion
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