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Differences What are the advantages of each

Front view of Radeon HD 6850 X2

Reasons to consider the
Generic Radeon HD 6850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 268.8 GB/s vs 224.4 GB/s Around 20% higher memory bandwidth
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
More render output processors 64 vs 56 8 more render output processors
More shading units 1,920 vs 1,664 256 more shading units
Front view of GeForce GTX 970

Reasons to consider the
Nvidia GeForce GTX 970

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Much better PassMark score 8,563 vs 2,534 Around 3.5x better PassMark score
Much higher effective memory clock speed 7,012 MHz vs 4,200 MHz More than 65% higher effective memory clock speed
Higher clock speed 1,050 MHz vs 800 MHz More than 30% higher clock speed
Much higher memory clock speed 1,753 MHz vs 1,050 MHz More than 65% higher memory clock speed
Higher texture rate 109.2 GTexel/s vs 76.8 GTexel/s More than 40% higher texture rate
Slightly higher pixel rate 58.8 GPixel/s vs 51.2 GPixel/s Around 15% higher pixel rate
Significantly lower TDP 148W vs 254W More than 40% lower TDP

Benchmarks Real world tests of Radeon HD 6850 X2 vs GeForce GTX 970

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Features Key features of the Radeon HD 6850 X2  vs GeForce GTX 970 

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

Radeon HD 6850 X2
268.8 GB/s
GeForce GTX 970
224.4 GB/s

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

Radeon HD 6850 X2
51.2 GPixel/s
GeForce GTX 970
58.8 GPixel/s

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

Radeon HD 6850 X2
76.8 GTexel/s
GeForce GTX 970
109.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6850 X2
3,072 GFLOPS
GeForce GTX 970
3,494 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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