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Differences What are the advantages of each

Front view of GeForce GTX 650

Reasons to consider the
Colorful GeForce GTX 650

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Significantly higher clock speed 1,058 MHz vs 550 MHz More than 90% higher clock speed
Much higher effective memory clock speed 5,000 MHz vs 1,600 MHz Around 3.2x higher effective memory clock speed
Higher memory bandwidth 80 GB/s vs 25.6 GB/s Around 3.2x higher memory bandwidth
Better floating-point performance 812.5 GFLOPS vs 89.6 GFLOPS More than 9x better floating-point performance
Higher texture rate 33.9 GTexel/s vs 8.8 GTexel/s More than 3.8x higher texture rate
Significantly higher memory clock speed 1,250 MHz vs 800 MHz More than 55% higher memory clock speed
More shading units 384 vs 32 352 more shading units
More render output processors 16 vs 8 Twice as many render output processors
More texture mapping units 32 vs 16 Twice as many texture mapping units
Front view of GeForce GT 120 Mac

Reasons to consider the
Nvidia GeForce GT 120 Mac

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Slightly lower TDP 50W vs 65W Around 25% lower TDP

Features Key features of the GeForce GTX 650  vs GT 120 Mac 

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 650
8.46 GPixel/s
GeForce GT 120 Mac
4.4 GPixel/s

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

GeForce GTX 650
33.9 GTexel/s
GeForce GT 120 Mac
8.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 650
812.5 GFLOPS
GeForce GT 120 Mac
89.6 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 650  vs
GT 120 Mac 
GPU brand Nvidia Nvidia
GPU name GK107 G96 C1
Market Desktop Desktop
Clock speed 1,058 MHz 550 MHz
Is dual GPU No No
Reference card Nvidia GeForce GTX 650 1.1 GHz 1 GB None

raw performance

Shading units 384 32
Texture mapping units 32 16
Render output processors 16 8
Pixel rate 8.46 GPixel/s 4.4 GPixel/s
Texture rate 33.9 GTexel/s 8.8 GTexel/s
Floating-point performance 812.5 GFLOPS 89.6 GFLOPS

memory

GeForce GTX 650  vs
GT 120 Mac 
Memory clock speed 1,250 MHz 800 MHz
Effective memory clock speed 5,000 MHz 1,600 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 512 MB
Memory type GDDR5 GDDR3
Memory bandwidth 80 GB/s 25.6 GB/s

noise and power

TDP 65W 50W

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