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Differences What are the advantages of each

Front view of Radeon HD 5970

Reasons to consider the
ATi Radeon HD 5970

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Significantly more shading units 3,200 vs 1,536 1664 more shading units
Better floating-point performance 4,640 GFLOPS vs 3,213 GFLOPS Around 45% better floating-point performance
Significantly more render output processors 64 vs 32 Twice as many render output processors
Higher memory bandwidth 256 GB/s vs 224 GB/s Around 15% higher memory bandwidth
Higher pixel rate 46.4 GPixel/s vs 33.5 GPixel/s Around 40% higher pixel rate
More texture mapping units 160 vs 128 32 more texture mapping units
Wider memory bus 512 bit vs 256 bit 2x wider memory bus
Front view of GeForce GTX 770

Reasons to consider the
Nvidia GeForce GTX 770

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Significantly better PassMark score 6,099 vs 2,599 More than 2.2x better PassMark score
Significantly better 3DMark06 score 29,690 vs 21,630 More than 35% better 3DMark06 score
Higher clock speed 1,046 MHz vs 725 MHz Around 45% higher clock speed
Better 3DMark vantage graphics score 36,150 vs 23,470 Around 55% better 3DMark vantage graphics score
Significantly higher effective memory clock speed 7,012 MHz vs 4,000 MHz More than 75% higher effective memory clock speed
Better 3DMark 11 graphics score 11,310 vs 7,660 Around 50% better 3DMark 11 graphics score
Significantly better fire strike factor score 60.75 vs 33.32 More than 80% better fire strike factor score
Significantly higher memory clock speed 1,753 MHz vs 1,000 MHz More than 75% higher memory clock speed
Better PassMark direct compute score 3,083 vs 1,209 More than 2.5x better PassMark direct compute score
Lower TDP 230W vs 294W More than 20% lower TDP

Benchmarks Real world tests of Radeon HD 5970 vs GeForce GTX 770

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

3DMark Vantage (Texture Fill) Industry standard benchmark that tests DirectX performance

3DMark 11 Graphics Industry standard benchmark that tests DirectX 11 GPU performance

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 5970
3,213.45
GeForce GTX 770
3,360.92

Manhattan (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 5970
3,454.16
GeForce GTX 770
3,719.62

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

Radeon HD 5970  vs GeForce GTX 770 

9.3
9.6
The GTX 770 WindForce OC is no different, but the improvement over the reference design cooler is, nevertheless, not that big because NVIDIA's cooler is already quite good.
GeForce GTX 770

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