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Differences What are the advantages of each

Front view of GeForce GT 640

Reasons to consider the
Leadtek GeForce GT 640

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Higher effective memory clock speed 1,800 MHz vs 1,000 MHz 80% higher effective memory clock speed
Higher clock speed 902 MHz vs 810 MHz More than 10% higher clock speed
Higher memory bandwidth 28.8 GB/s vs 8 GB/s More than 3.5x higher memory bandwidth
Slightly better floating-point performance 692.7 GFLOPS vs 155.52 GFLOPS Around 4.5x better floating-point performance
Higher texture rate 28.86 GTexel/s vs 6.48 GTexel/s Around 4.5x higher texture rate
Significantly higher memory clock speed 900 MHz vs 500 MHz 80% higher memory clock speed
More render output processors 16 vs 4 12 more render output processors
More texture mapping units 32 vs 8 24 more texture mapping units
More shading units 384 vs 48 336 more shading units
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
Front view of GeForce GT 610 PCIe x1

Reasons to consider the
Nvidia GeForce GT 610 PCIe x1

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Lower TDP 29W vs 65W 2.2x lower TDP

Features Key features of the GeForce GT 640  vs 610 PCIe x1 

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 GT 640
7.22 GPixel/s
GeForce GT 610 PCIe x1
1.62 GPixel/s

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

GeForce GT 640
28.86 GTexel/s
GeForce GT 610 PCIe x1
6.48 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GT 640
692.7 GFLOPS
GeForce GT 610 PCIe x1
155.52 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


GeForce GT 640  vs
610 PCIe x1 
GPU brand Nvidia Nvidia
GPU name GK107 GF119
Market Desktop Desktop
Clock speed 902 MHz 810 MHz
Is dual GPU No No
Reference card Nvidia GeForce GT 640 902 MHz 2 GB None

raw performance

Shading units 384 48
Texture mapping units 32 8
Render output processors 16 4
Pixel rate 7.22 GPixel/s 1.62 GPixel/s
Texture rate 28.86 GTexel/s 6.48 GTexel/s
Floating-point performance 692.7 GFLOPS 155.52 GFLOPS


GeForce GT 640  vs
610 PCIe x1 
Memory clock speed 900 MHz 500 MHz
Effective memory clock speed 1,800 MHz 1,000 MHz
Memory bus 128 bit 64 bit
Memory 1,024 MB 512 MB
Memory type DDR3 DDR3
Memory bandwidth 28.8 GB/s 8 GB/s

noise and power

TDP 65W 29W


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