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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
Significantly higher texture rate 268.8 GTexel/s vs 176 GTexel/s Around 55% higher texture rate
Significantly more shading units 4,096 vs 2,816 1280 more shading units
Significantly more texture mapping units 256 vs 176 80 more texture mapping units
Much wider memory bus 768 bit vs 384 bit 2x wider memory bus
Front view of GeForce GTX 980 Ti

Reasons to consider the
Nvidia GeForce GTX 980 Ti

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Higher effective memory clock speed 7,012 MHz vs 6,000 MHz More than 15% higher effective memory clock speed
Better floating-point performance 5,632 GFLOPS vs 4,300.8 GFLOPS More than 30% better floating-point performance
Higher pixel rate 96 GPixel/s vs 67.2 GPixel/s Around 45% higher pixel rate
Significantly more render output processors 96 vs 64 32 more render output processors
Higher memory clock speed 1,753 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 980 Ti 

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 980 Ti
96 GPixel/s

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

Radeon HD 7970 X2
268.8 GTexel/s
GeForce GTX 980 Ti
176 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7970 X2
4,300.8 GFLOPS
GeForce GTX 980 Ti
5,632 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

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

Specifications Full list of technical specs

gpu

Radeon HD 7970 X2  vs
GeForce GTX 980 Ti 
GPU brand AMD Nvidia
GPU name New Zealand GM200
Market Desktop Desktop
Clock speed 1,050 MHz 1,000 MHz
Is dual GPU Yes No
Reference card AMD Radeon HD 7970 X2 925 MHz 6 GB None

raw performance

Shading units 4,096 2,816
Texture mapping units 256 176
Render output processors 64 96
Pixel rate 67.2 GPixel/s 96 GPixel/s
Texture rate 268.8 GTexel/s 176 GTexel/s
Floating-point performance 4,300.8 GFLOPS 5,632 GFLOPS

memory

Radeon HD 7970 X2  vs
GeForce GTX 980 Ti 
Memory clock speed 1,500 MHz 1,753 MHz
Effective memory clock speed 6,000 MHz 7,012 MHz
Memory bus 768 bit 384 bit
Memory 6,144 MB 6,144 MB
Memory type GDDR5 GDDR5

noise and power

TDP 375W 250W

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