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Differences What are the advantages of each

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
Better floating-point performance 5,099.6 GFLOPS vs 3,977 GFLOPS Around 30% better floating-point performance
Higher memory bandwidth 320 GB/s vs 288.4 GB/s More than 10% higher memory bandwidth
More memory 4,096 MB vs 3,072 MB Around 35% more memory
More shading units 3,072 vs 2,304 768 more shading units
More render output processors 64 vs 48 16 more render output processors
Higher pixel rate 53.12 GPixel/s vs 41.4 GPixel/s Around 30% higher pixel rate
Wider memory bus 512 bit vs 384 bit Around 35% wider memory bus
Front view of GeForce GTX 780

Reasons to consider the
Nvidia GeForce GTX 780

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Much better PassMark score 7,976 vs 2,844 More than 2.8x better PassMark score
Significantly better 3DMark vantage graphics score 42,870 vs 27,760 Around 55% better 3DMark vantage graphics score
Better 3DMark06 score 35,080 vs 30,500 More than 15% better 3DMark06 score
Better 3DMark 11 graphics score 14,020 vs 10,630 More than 30% better 3DMark 11 graphics score
Higher effective memory clock speed 6,008 MHz vs 5,000 MHz More than 20% higher effective memory clock speed
Much better particle simulation score 966.29 mInteraction/s vs 264.29 mInteraction/s Around 3.8x better particle simulation score
Significantly better PassMark direct compute score 3,971 vs 1,255 Around 3.2x better PassMark direct compute score
Higher memory clock speed 1,502 MHz vs 1,250 MHz More than 20% higher memory clock speed
Significantly lower TDP 250W vs 375W Around 35% lower TDP

Benchmarks Real world tests of Radeon HD 6990 vs GeForce GTX 780

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

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

Bitcoin mining Data courtesy CompuBench

Radeon HD 6990
265.3 mHash/s
GeForce GTX 780
255.31 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 6990
17.28 mPixels/s
GeForce GTX 780
57.69 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 6990
840.45 frames/s
GeForce GTX 780
1,928.62 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 6990
264.29 mInteraction/s
GeForce GTX 780
966.29 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 6990
1.76 frames/s
GeForce GTX 780
5.49 frames/s

Video composition Data courtesy CompuBench

Radeon HD 6990
53.97 frames/s
GeForce GTX 780
91.16 frames/s

Reviews Word on the street

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