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Differences What are the advantages of each

Front view of GeForce GTX 460

Reasons to consider the
Nvidia GeForce GTX 460

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Higher memory bandwidth 115.2 GB/s vs 28.8 GB/s 4x higher memory bandwidth
Higher effective memory clock speed 3,600 MHz vs 1,800 MHz 2x higher effective memory clock speed
More render output processors 32 vs 16 Twice as many render output processors
Slightly more texture mapping units 56 vs 32 24 more texture mapping units
Front view of GeForce GT 640

Reasons to consider the
Leadtek GeForce GT 640

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Significantly higher clock speed 902 MHz vs 675 MHz Around 35% higher clock speed
Lower TDP 65W vs 160W 2.5x lower TDP

Benchmarks Real world tests of GeForce GTX 460 vs GT 640

Bitcoin mining Data courtesy CompuBench

GeForce GTX 460
77.29 mHash/s
GeForce GT 640
24.09 mHash/s

Face detection Data courtesy CompuBench

GeForce GTX 460
21.38 mPixels/s
GeForce GT 640
10.39 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GTX 460
617.85 frames/s
GeForce GT 640
204.44 frames/s

Particle simulation Data courtesy CompuBench

GeForce GTX 460
187.11 mInteraction/s
GeForce GT 640
97.49 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GTX 460
2.06 frames/s
GeForce GT 640
0.94 frames/s

Video composition Data courtesy CompuBench

GeForce GTX 460
32.04 frames/s
GeForce GT 640
14.41 frames/s

Reviews Word on the street

GeForce GTX 460  vs GT 640 

9.0
7.2
If you read our other GeForce GTX 460 reviews today you will have noticed that NVIDIA's reference design cooler is very quiet.
GeForce GTX 460

Comments

Showing 1 comment.
Actually, it appears this benchmark is comparing against the Fermi version of the 640, based on the memory bandwidth alone.
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