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Differences What are the advantages of each

Front view of Radeon HD 7970 X2

Reasons to consider the
HIS Radeon HD 7970 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Much higher memory bandwidth 576 GB/s vs 336 GB/s More than 70% higher memory bandwidth
More memory 6,144 MB vs 3,072 MB 2x more memory
Higher clock speed 1,050 MHz vs 875 MHz 20% higher clock speed
Higher texture rate 268.8 GTexel/s vs 210 GTexel/s Around 30% higher texture rate
Significantly more shading units 4,096 vs 2,880 1216 more shading units
Much wider memory bus 768 bit vs 384 bit 2x wider memory bus
Higher pixel rate 67.2 GPixel/s vs 52.5 GPixel/s Around 30% higher pixel rate
More render output processors 64 vs 48 16 more render output processors
More texture mapping units 256 vs 240 16 more texture mapping units
Front view of GeForce GTX 780 Ti

Reasons to consider the
Nvidia GeForce GTX 780 Ti

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Higher effective memory clock speed 7,000 MHz vs 6,000 MHz More than 15% higher effective memory clock speed
Better floating-point performance 5,040 GFLOPS vs 4,300.8 GFLOPS More than 15% better floating-point performance
Higher memory clock speed 1,752 MHz vs 1,500 MHz More than 15% higher memory clock speed
Significantly lower TDP 250W vs 375W Around 35% lower TDP

Features Key features of the Radeon HD 7970 X2  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

Radeon HD 7970 X2
67.2 GPixel/s
GeForce GTX 780 Ti
52.5 GPixel/s

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

Radeon HD 7970 X2
268.8 GTexel/s
GeForce GTX 780 Ti
210 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7970 X2
4,300.8 GFLOPS
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

gpu

Radeon HD 7970 X2  vs
GeForce GTX 780 Ti 
GPU brand AMD Nvidia
GPU name New Zealand GK110B
Market Desktop Desktop
Clock speed 1,050 MHz 875 MHz
Is dual GPU Yes No
Reference card AMD Radeon HD 7970 X2 925 MHz 6 GB None

raw performance

Shading units 4,096 2,880
Texture mapping units 256 240
Render output processors 64 48
Pixel rate 67.2 GPixel/s 52.5 GPixel/s
Texture rate 268.8 GTexel/s 210 GTexel/s
Floating-point performance 4,300.8 GFLOPS 5,040 GFLOPS

memory

Radeon HD 7970 X2  vs
GeForce GTX 780 Ti 
Memory clock speed 1,500 MHz 1,752 MHz
Effective memory clock speed 6,000 MHz 7,000 MHz
Memory bus 768 bit 384 bit
Memory 6,144 MB 3,072 MB
Memory type GDDR5 GDDR5
Memory bandwidth 576 GB/s 336 GB/s

noise and power

TDP 375W 250W

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