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Differences What are the advantages of each

Front view of Radeon HD 7770

Reasons to consider the
AMD Radeon HD 7770

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Higher clock speed 1,000 MHz vs 750 MHz Around 35% higher clock speed
Significantly lower TDP 80W vs 186W 2.3x lower TDP
Front view of Radeon HD 6930

Reasons to consider the
AMD Radeon HD 6930

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Significantly better 3DMark06 score 26,350 vs 19,307 More than 35% better 3DMark06 score
Significantly higher memory bandwidth 153.6 GB/s vs 72 GB/s Around 2.2x higher memory bandwidth
Better 3DMark vantage graphics score 19,070 vs 13,398 More than 40% better 3DMark vantage graphics score
Better 3DMark 11 graphics score 4,880 vs 3,098 Around 60% better 3DMark 11 graphics score
Better floating-point performance 1,920 GFLOPS vs 1,280 GFLOPS 50% better floating-point performance
More render output processors 32 vs 16 Twice as many render output processors
More shading units 1,280 vs 640 Twice as many shading units
More texture mapping units 80 vs 40 Twice as many texture mapping units
Higher texture rate 60 GTexel/s vs 40 GTexel/s 50% higher texture rate
Higher pixel rate 24 GPixel/s vs 16 GPixel/s 50% higher pixel rate
More compute units 20 vs 10 Twice as many compute units
Wider memory bus 256 bit vs 128 bit 2x wider memory bus
Slightly higher memory clock speed 1,200 MHz vs 1,125 MHz More than 5% higher memory clock speed

Benchmarks Real world tests of Radeon HD 7770 vs 6930

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

3DMark Vantage Graphics Industry standard benchmark that tests DirectX 10 GPU performance

3DMark06 Industry standard benchmark that tests DirectX 9 GPU performance

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

CLBenchmark Raytrace Measures compute performance using OpenCL to do raytracing

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