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Differences What are the advantages of each

Front view of Radeon HD 5670 640SP

Reasons to consider the
ATi Radeon HD 5670 640SP

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Much lower TDP 64W vs 250W 3.9x lower TDP
Front view of GeForce GTX 780 Ti

Reasons to consider the
Nvidia GeForce GTX 780 Ti

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Much higher memory bandwidth 336 GB/s vs 64 GB/s 5.2x higher memory bandwidth
Much higher effective memory clock speed 7,000 MHz vs 4,000 MHz 75% higher effective memory clock speed
Much better floating-point performance 5,040 GFLOPS vs 960 GFLOPS 5.2x better floating-point performance
Much higher texture rate 210 GTexel/s vs 24 GTexel/s 8.8x higher texture rate
Many more texture mapping units 240 vs 32 208 more texture mapping units
More memory 3,072 MB vs 512 MB 6x more memory
Significantly higher pixel rate 52.5 GPixel/s vs 6 GPixel/s 8.8x higher pixel rate
Many more shading units 2,880 vs 640 2240 more shading units
Higher clock speed 875 MHz vs 750 MHz More than 15% higher clock speed
Many more render output processors 48 vs 8 40 more render output processors
Much higher memory clock speed 1,752 MHz vs 1,000 MHz More than 75% higher memory clock speed
Much wider memory bus 384 bit vs 128 bit 3x wider memory bus

Features Key features of the Radeon HD 5670 640SP  vs GeForce GTX 780 Ti 

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 780 Ti
52.5 GPixel/s

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

Radeon HD 5670 640SP
24 GTexel/s
GeForce GTX 780 Ti
210 GTexel/s

floating point performance How fast the gpu can crunch numbers

GeForce GTX 780 Ti
5,040 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


Radeon HD 5670 640SP  vs
GeForce GTX 780 Ti 
GPU brand ATI Nvidia
GPU name Juniper GK110B
Market Desktop Desktop
Clock speed 750 MHz 875 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 2,880
Texture mapping units 32 240
Render output processors 8 48
Pixel rate 6 GPixel/s 52.5 GPixel/s
Texture rate 24 GTexel/s 210 GTexel/s
Floating-point performance 960 GFLOPS 5,040 GFLOPS


Radeon HD 5670 640SP  vs
GeForce GTX 780 Ti 
Memory clock speed 1,000 MHz 1,752 MHz
Effective memory clock speed 4,000 MHz 7,000 MHz
Memory bus 128 bit 384 bit
Memory 512 MB 3,072 MB
Memory type GDDR5 GDDR5
Memory bandwidth 64 GB/s 336 GB/s

noise and power

TDP 64W 250W


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