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Differences What are the advantages of each

Front view of Radeon HD 8990

Reasons to consider the
AMD Radeon HD 8990

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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 288.4 GB/s Around 2x higher memory bandwidth
Much better floating-point performance 10,752 GFLOPS vs 3,977 GFLOPS Around 2.8x better floating-point performance
Much higher texture rate 336 GTexel/s vs 165.7 GTexel/s More than 2x higher texture rate
More memory 6,144 MB vs 3,072 MB 2x more memory
Significantly higher pixel rate 100.8 GPixel/s vs 41.4 GPixel/s Around 2.5x higher pixel rate
Higher clock speed 1,050 MHz vs 863 MHz More than 20% higher clock speed
Many more shading units 5,120 vs 2,304 2816 more shading units
Many more texture mapping units 320 vs 192 128 more texture mapping units
Significantly more render output processors 96 vs 48 Twice as many render output processors
Better ocean surface simulation score 1,984.65 frames/s vs 1,345 frames/s Around 50% better ocean surface simulation score
Wider memory bus 768 bit vs 384 bit 2x wider memory bus
Front view of GeForce GTX 780

Reasons to consider the
Nvidia GeForce GTX 780

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Better PassMark score 7,995 vs 5,041 Around 60% better PassMark score
Better PassMark direct compute score 3,959 vs 2,746 Around 45% better PassMark direct compute score

Benchmarks Real world tests of Radeon HD 8990 vs GeForce GTX 780

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Bitcoin mining Data courtesy CompuBench

Radeon HD 8990
470.24 mHash/s
GeForce GTX 780
249.35 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 8990
44.48 mPixels/s
GeForce GTX 780
55.38 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 8990
1,984.65 frames/s
GeForce GTX 780
1,345 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 8990
566.58 mInteraction/s
GeForce GTX 780
671.63 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 8990
8.54 frames/s
GeForce GTX 780
5.3 frames/s

Video composition Data courtesy CompuBench

Radeon HD 8990
125.5 frames/s
GeForce GTX 780
39.52 frames/s

PassMark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

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