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Differences What are the advantages of each

Front view of Radeon HD 3850 X2

Reasons to consider the
ATi Radeon HD 3850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Significantly wider memory bus 512 bit vs 320 bit 60% wider memory bus
Lower TDP 140W vs 219W More than 35% lower TDP
Front view of GeForce GTX 570

Reasons to consider the
EVGA GeForce GTX 570

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Significantly better PassMark score 4,412 vs 792 More than 5.5x better PassMark score
Significantly higher effective memory clock speed 3,900 MHz vs 1,656 MHz More than 2.2x higher effective memory clock speed
Higher memory bandwidth 156 GB/s vs 105.98 GB/s More than 45% higher memory bandwidth
Higher clock speed 797 MHz vs 669 MHz Around 20% higher clock speed
Better floating-point performance 1,530 GFLOPS vs 856.4 GFLOPS Around 80% better floating-point performance
Higher texture rate 47.82 GTexel/s vs 21.4 GTexel/s Around 2.2x higher texture rate
More texture mapping units 60 vs 32 28 more texture mapping units
More render output processors 40 vs 32 8 more render output processors
Higher memory clock speed 975 MHz vs 828 MHz Around 20% higher memory clock speed

Benchmarks Real world tests of Radeon HD 3850 X2 vs GeForce GTX 570

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon HD 3850 X2  vs GeForce GTX 570 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon HD 3850 X2
105.98 GB/s
GeForce GTX 570
156 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 3850 X2
21.4 GPixel/s
GeForce GTX 570
23.91 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon HD 3850 X2
21.4 GTexel/s
GeForce GTX 570
47.82 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3850 X2
856.4 GFLOPS
GeForce GTX 570
1,530 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes


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