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Differences What are the advantages of each

Front view of GeForce GTX 650 Ti

Reasons to consider the
Axigon GeForce GTX 650 Ti

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Significantly higher clock speed 1,006 MHz vs 810 MHz Around 25% higher clock speed
Significantly higher effective memory clock speed 5,400 MHz vs 3,200 MHz Around 70% higher effective memory clock speed
Better floating-point performance 1,545 GFLOPS vs 311 GFLOPS Around 5x better floating-point performance
Higher texture rate 64.4 GTexel/s vs 13 GTexel/s Around 5x higher texture rate
Higher pixel rate 16.1 GPixel/s vs 3.24 GPixel/s Around 5x higher pixel rate
Much higher memory clock speed 1,350 MHz vs 800 MHz Around 70% higher memory clock speed
Higher memory bandwidth 86.4 GB/s vs 51.2 GB/s Around 70% higher memory bandwidth
More shading units 768 vs 96 672 more shading units
More render output processors 16 vs 4 12 more render output processors
More texture mapping units 64 vs 16 48 more texture mapping units
Front view of GeForce GT 630

Reasons to consider the
EVGA GeForce GT 630

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Lower TDP 65W vs 110W More than 40% lower TDP

Features Key features of the GeForce GTX 650 Ti  vs GT 630 

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

GeForce GTX 650 Ti
86.4 GB/s
GeForce GT 630
51.2 GB/s
Unlike the other GTX 650 Ti cards that we reviewed before, this card comes with 2 GB of GDDR5 memory, whereas the other boards only had 1 GB.
GeForce GTX 650 Ti | by techPowerUp! (Oct, 2012)

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

GeForce GTX 650 Ti
16.1 GPixel/s
GeForce GT 630
3.24 GPixel/s
It offers fantastic cooling performance and equally low noise levels.
GeForce GTX 650 Ti | by techPowerUp! (Apr, 2013)

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

GeForce GTX 650 Ti
64.4 GTexel/s
GeForce GT 630
13 GTexel/s
9.1NVIDIA's new GeForce GTX 650 Ti offers much better performance than the normal GTX 650.
GeForce GTX 650 Ti | by techPowerUp! (Oct, 2012)

floating point performance How fast the gpu can crunch numbers

GeForce GTX 650 Ti
1,545 GFLOPS
GeForce GT 630
311 GFLOPS
Based on a rehashed AnvilNext game engine that uses DirectX 11 and Havok CPU physics, Assassin's Creed III is the most graphics-intensive member of the franchise, depicting North American landscapes in great detail.
GeForce GTX 650 Ti | by techPowerUp! (Apr, 2013)

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 650 Ti  vs
GT 630 
GPU brand Nvidia Nvidia
GPU name GK106 GF108
Market Desktop Desktop
Clock speed 1,006 MHz 810 MHz
Is dual GPU No No
Reference card Nvidia GeForce GTX 650 Ti 928 MHz 1 GB Nvidia GeForce GT 630 810 MHz 1 GB

raw performance

Shading units 768 96
Texture mapping units 64 16
Render output processors 16 4
Pixel rate 16.1 GPixel/s 3.24 GPixel/s
Texture rate 64.4 GTexel/s 13 GTexel/s
Floating-point performance 1,545 GFLOPS 311 GFLOPS

memory

GeForce GTX 650 Ti  vs
GT 630 
Memory clock speed 1,350 MHz 800 MHz
Effective memory clock speed 5,400 MHz 3,200 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 86.4 GB/s 51.2 GB/s

noise and power

TDP 110W 65W

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