GPUBoss Review Our evaluation of 7970 vs 6990 among Desktop GPUs

Gaming

Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more

Graphics

T-Rex, Manhattan, Cloud Gate Factor, Sky Diver Factor and 1 more

Computing

Face Detection, Ocean Surface Simulation and 3 more

Performance per Watt

Battlefield 3, Battlefield 4, Bioshock Infinite and 32 more

Value

Battlefield 3, Battlefield 4, Bioshock Infinite and 32 more

Noise and Power

TDP, Idle Power Consumption, Load Power Consumption and 2 more

7.5

Overall Score

Winner
AMD Radeon HD 7970 

GPUBoss recommends the AMD Radeon HD 7970  based on its noise and power.

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VS

Differences What are the advantages of each

Front view of Radeon HD 7970

Reasons to consider the
AMD Radeon HD 7970

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Much better T-Rex score 8.62 frames/s vs 1.76 frames/s Around 5x better T-Rex score
Higher clock speed 925 MHz vs 830 MHz More than 10% higher clock speed
Higher effective memory clock speed 5,500 MHz vs 5,000 MHz 10% higher effective memory clock speed
Better sky diver factor score 380.04 vs 340.31 More than 10% better sky diver factor score
Higher memory clock speed 1,375 MHz vs 1,250 MHz 10% higher memory clock speed
Significantly lower TDP 250W vs 375W Around 35% lower TDP
Front view of Radeon HD 6990

Reasons to consider the
Diamond Radeon HD 6990

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 320 GB/s vs 264 GB/s More than 20% higher memory bandwidth
Better floating-point performance 5,099.6 GFLOPS vs 3,789 GFLOPS Around 35% better floating-point performance
Significantly more render output processors 64 vs 32 Twice as many render output processors
Higher pixel rate 53.12 GPixel/s vs 29.6 GPixel/s Around 80% higher pixel rate
More memory 4,096 MB vs 3,072 MB Around 35% more memory
Higher texture rate 159.4 GTexel/s vs 118.4 GTexel/s Around 35% higher texture rate
Significantly more shading units 3,072 vs 2,048 1024 more shading units
Significantly more texture mapping units 192 vs 128 64 more texture mapping units
More compute units 48 vs 32 16 more compute units
Wider memory bus 512 bit vs 384 bit Around 35% wider memory bus

Benchmarks Real world tests of Radeon HD 7970 vs 6990

Bitcoin mining Data courtesy CompuBench

Radeon HD 7970
447.28 mHash/s
Radeon HD 6990
265.3 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 7970
49.05 mPixels/s
Radeon HD 6990
17.28 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 7970
261.64 frames/s
Radeon HD 6990
840.45 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 7970
52.96 mInteraction/s
Radeon HD 6990
264.29 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 7970
8.62 frames/s
Radeon HD 6990
1.76 frames/s

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

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Comments

Showing 2 comments.
Thanks for pointing this out Stian. Just fixed this.
Somethings wrong here... the 6990 has 4gb memory
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