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Differences What are the advantages of each

Front view of GeForce GTX 960M

Reasons to consider the
Nvidia GeForce GTX 960M

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Much higher clock speed 1,097 MHz vs 625 MHz More than 75% higher clock speed
Significantly higher effective memory clock speed 5,012 MHz vs 1,800 MHz More than 2.8x higher effective memory clock speed
Higher memory bandwidth 80.2 GB/s vs 14.4 GB/s More than 5.5x higher memory bandwidth
Better floating-point performance 1,404.2 GFLOPS vs 240 GFLOPS More than 5.8x better floating-point performance
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher pixel rate 17.55 GPixel/s vs 2.5 GPixel/s More than 7x higher pixel rate
Higher texture rate 43.9 GTexel/s vs 10 GTexel/s Around 4.5x higher texture rate
More shading units 640 vs 96 544 more shading units
Significantly higher memory clock speed 1,253 MHz vs 900 MHz Around 40% higher memory clock speed
More texture mapping units 40 vs 16 24 more texture mapping units
More render output processors 16 vs 8 Twice as many render output processors
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce 620M

Reasons to consider the
Nvidia GeForce 620M

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Lower TDP 15W vs 75W 5x lower TDP

Features Key features of the GeForce GTX 960M  vs 620M 

memory bandwidth Rate at which data can be read from or stored in onboard memory

GeForce GTX 960M
80.2 GB/s
GeForce 620M
14.4 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

GeForce GTX 960M
17.55 GPixel/s
GeForce 620M
2.5 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

GeForce GTX 960M
43.9 GTexel/s
GeForce 620M
10 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 960M
1,404.2 GFLOPS
GeForce 620M
240 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Specifications Full list of technical specs

gpu

GeForce GTX 960M  vs
620M 
GPU brand Nvidia Nvidia
GPU name GM107 GF117
Market Laptop Laptop
Clock speed 1,097 MHz 625 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 96
Texture mapping units 40 16
Render output processors 16 8
Pixel rate 17.55 GPixel/s 2.5 GPixel/s
Texture rate 43.9 GTexel/s 10 GTexel/s
Floating-point performance 1,404.2 GFLOPS 240 GFLOPS

memory

GeForce GTX 960M  vs
620M 
Memory clock speed 1,253 MHz 900 MHz
Effective memory clock speed 5,012 MHz 1,800 MHz
Memory bus 128 bit 64 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 DDR3
Memory bandwidth 80.2 GB/s 14.4 GB/s

noise and power

TDP 75W 15W

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