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Differences What are the advantages of each

Front view of Radeon HD 9970

Reasons to consider the
AMD Radeon HD 9970

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Much better floating-point performance 8,192 GFLOPS vs 3,789 GFLOPS Around 2.2x better floating-point performance
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
Significantly higher pixel rate 64 GPixel/s vs 29.6 GPixel/s Around 2.2x higher pixel rate
Higher memory bandwidth 307 GB/s vs 264 GB/s More than 15% higher memory bandwidth
Significantly more render output processors 64 vs 32 Twice as many render output processors
Higher texture rate 168 GTexel/s vs 118.4 GTexel/s More than 40% higher texture rate
More memory 4,096 MB vs 3,072 MB Around 35% more memory
Slightly higher clock speed 1,000 MHz vs 925 MHz Around 10% higher clock speed
Wider memory bus 512 bit vs 384 bit Around 35% wider memory bus
Front view of Radeon HD 7970

Reasons to consider the
AMD Radeon HD 7970

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Higher effective memory clock speed 5,500 MHz vs 5,000 MHz 10% higher effective memory clock speed
More compute units 32 vs 16 Twice as many compute units
Higher memory clock speed 1,375 MHz vs 1,250 MHz 10% higher memory clock speed

Features Key features of the Radeon HD 9970  vs 7970 

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

Radeon HD 9970
307 GB/s
Radeon HD 7970
264 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 9970
64 GPixel/s
Radeon HD 7970
29.6 GPixel/s

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

Radeon HD 9970
168 GTexel/s
Radeon HD 7970
118.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 9970
8,192 GFLOPS
Radeon HD 7970
3,789 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 9970  vs
7970 
GPU brand AMD AMD
GPU name Hawaii XT Tahiti XT
Market Desktop Desktop
Clock speed 1,000 MHz 925 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 4,096 2,048
Texture mapping units 256 128
Render output processors 64 32
Compute units 16 32
Pixel rate 64 GPixel/s 29.6 GPixel/s
Texture rate 168 GTexel/s 118.4 GTexel/s
Floating-point performance 8,192 GFLOPS 3,789 GFLOPS

memory

Radeon HD 9970  vs
7970 
Memory clock speed 1,250 MHz 1,375 MHz
Effective memory clock speed 5,000 MHz 5,500 MHz
Memory bus 512 bit 384 bit
Memory 4,096 MB 3,072 MB
Memory type GDDR5 GDDR5
Memory bandwidth 307 GB/s 264 GB/s

noise and power

TDP 255W 250W

Comments

Showing 3 comments.
7970
Daaaaaaaaaaaamnnnn
AMD isn't messing around, I want to see how this thing performs on bf4!
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