Radeon HD 5770 vs GeForce GT 640 Rebrand |
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Differences What are the advantages of each
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| Much higher effective memory clock speed | 4,800 MHz | vs | 1,600 MHz | 3x higher effective memory clock speed | |||
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| Better 3DMark06 score | 17,844 | vs | 13,300 | Around 35% better 3DMark06 score | |||
| Higher clock speed | 850 MHz | vs | 720 MHz | Around 20% higher clock speed | |||
| Higher memory bandwidth | 76.8 GB/s | vs | 38.4 GB/s | 2x higher memory bandwidth | |||
| Better floating-point performance | 1,360 GFLOPS | vs | 414.7 GFLOPS | More than 3.2x better floating-point performance | |||
| More shading units | 800 | vs | 144 | 656 more shading units | |||
| Significantly higher memory clock speed | 1,200 MHz | vs | 800 MHz | 50% higher memory clock speed | |||
| Higher pixel rate | 13.6 GPixel/s | vs | 4.32 GPixel/s | Around 3.2x higher pixel rate | |||
| Slightly higher texture rate | 34 GTexel/s | vs | 17.28 GTexel/s | More than 95% higher texture rate | |||
| More texture mapping units | 40 | vs | 24 | 16 more texture mapping units | |||
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| More render output processors | 24 | vs | 16 | 8 more render output processors | |||
| Wider memory bus | 192 bit | vs | 128 bit | 50% wider memory bus | |||
| Lower TDP | 75W | vs | 108W | More than 30% lower TDP | |||
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Benchmarks Real world tests of Radeon HD 5770 vs GeForce GT 640 Rebrand
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
CLBenchmark Raytrace Measures compute performance using OpenCL to do raytracing
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