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Differences What are the advantages of each

Front view of GeForce GTX 960

Reasons to consider the
Nvidia GeForce GTX 960

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Much higher effective memory clock speed 7,012 MHz vs 1,800 MHz Around 4x higher effective memory clock speed
Significantly higher memory bandwidth 112.2 GB/s vs 14.4 GB/s More than 7.8x higher memory bandwidth
Higher clock speed 1,127 MHz vs 902 MHz Around 25% higher clock speed
Better floating-point performance 2,308.1 GFLOPS vs 692.7 GFLOPS More than 3.2x better floating-point performance
Higher pixel rate 36.1 GPixel/s vs 7.22 GPixel/s More than 5x higher pixel rate
Higher texture rate 72.1 GTexel/s vs 14.43 GTexel/s Around 5x higher texture rate
Much higher memory clock speed 1,753 MHz vs 900 MHz Around 95% higher memory clock speed
Significantly more render output processors 32 vs 8 24 more render output processors
More texture mapping units 64 vs 16 48 more texture mapping units
More shading units 1,024 vs 384 640 more shading units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce GT 630 PCIe x8

Reasons to consider the
Nvidia GeForce GT 630 PCIe x8

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Significantly lower TDP 25W vs 120W 4.8x lower TDP

Features Key features of the GeForce GTX 960  vs GT 630 PCIe x8 

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

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

GeForce GTX 960
36.1 GPixel/s
GeForce GT 630 PCIe x8
7.22 GPixel/s

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

GeForce GTX 960
72.1 GTexel/s
GeForce GT 630 PCIe x8
14.43 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 960
2,308.1 GFLOPS
GeForce GT 630 PCIe x8
692.7 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 960  vs
GT 630 PCIe x8 
GPU brand Nvidia Nvidia
GPU name GM206 GK208
Market Desktop Desktop
Clock speed 1,127 MHz 902 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,024 384
Texture mapping units 64 16
Render output processors 32 8
Pixel rate 36.1 GPixel/s 7.22 GPixel/s
Texture rate 72.1 GTexel/s 14.43 GTexel/s
Floating-point performance 2,308.1 GFLOPS 692.7 GFLOPS

memory

GeForce GTX 960  vs
GT 630 PCIe x8 
Memory clock speed 1,753 MHz 900 MHz
Effective memory clock speed 7,012 MHz 1,800 MHz
Memory bus 128 bit 64 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 DDR3
Memory bandwidth 112.2 GB/s 14.4 GB/s

noise and power

TDP 120W 25W

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