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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 224.4 GB/s More than 2.5x higher memory bandwidth
Significantly higher texture rate 268.8 GTexel/s vs 155.6 GTexel/s Around 75% higher texture rate
More memory 6,144 MB vs 4,096 MB 50% more memory
Many more shading units 4,096 vs 2,048 Twice as many shading units
Many more texture mapping units 256 vs 128 Twice as many texture mapping units
Much wider memory bus 768 bit vs 256 bit 3x wider memory bus
Front view of GeForce GTX 980

Reasons to consider the
Nvidia GeForce GTX 980

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Higher effective memory clock speed 7,012 MHz vs 6,000 MHz More than 15% higher effective memory clock speed
Slightly higher clock speed 1,127 MHz vs 1,050 MHz More than 5% higher clock speed
Better floating-point performance 4,981 GFLOPS vs 4,300.8 GFLOPS More than 15% better floating-point performance
Higher pixel rate 77.82 GPixel/s vs 67.2 GPixel/s More than 15% higher pixel rate
Higher memory clock speed 1,753 MHz vs 1,500 MHz More than 15% higher memory clock speed
Much lower TDP 165W vs 375W 2.3x lower TDP

Features Key features of the Radeon HD 7970 X2  vs GeForce GTX 980 

memory bandwidth Rate at which data can be read from or stored in onboard memory

GeForce GTX 980
224.4 GB/s

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
77.82 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
155.6 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7970 X2
4,300.8 GFLOPS
GeForce GTX 980
4,981 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 980 
GPU brand AMD Nvidia
GPU name New Zealand GM204
Market Desktop Desktop
Clock speed 1,050 MHz 1,127 MHz
Is dual GPU Yes No
Reference card AMD Radeon HD 7970 X2 925 MHz 6 GB None

raw performance

Shading units 4,096 2,048
Texture mapping units 256 128
Render output processors 64 64
Pixel rate 67.2 GPixel/s 77.82 GPixel/s
Texture rate 268.8 GTexel/s 155.6 GTexel/s
Floating-point performance 4,300.8 GFLOPS 4,981 GFLOPS

memory

Radeon HD 7970 X2  vs
GeForce GTX 980 
Memory clock speed 1,500 MHz 1,753 MHz
Effective memory clock speed 6,000 MHz 7,012 MHz
Memory bus 768 bit 256 bit
Memory 6,144 MB 4,096 MB
Memory type GDDR5 GDDR5
Memory bandwidth 576 GB/s 224.4 GB/s

noise and power

TDP 375W 165W

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