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Differences What are the advantages of each

Front view of Radeon HD 6850

Reasons to consider the
AMD Radeon HD 6850

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Much higher effective memory clock speed 4,000 MHz vs 1,020 MHz Around 4x higher effective memory clock speed
Much higher memory bandwidth 128 GB/s vs 16.32 GB/s More than 7.8x higher memory bandwidth
Higher clock speed 775 MHz vs 500 MHz More than 55% higher clock speed
Much better cloud gate factor score 16.97 vs 6.8 Around 2.5x better cloud gate factor score
Better floating-point performance 1,488 GFLOPS vs 240 GFLOPS Around 6.2x better floating-point performance
Higher pixel rate 24.8 GPixel/s vs 8 GPixel/s More than 3x higher pixel rate
More shading units 960 vs 96 864 more shading units
Slightly more memory 1,024 MB vs 256 MB 4x more memory
More render output processors 32 vs 16 Twice as many render output processors
Significantly higher memory clock speed 1,000 MHz vs 510 MHz More than 95% higher memory clock speed
Wider memory bus 256 bit vs 128 bit 2x wider memory bus
Front view of GeForce GT 330

Reasons to consider the
Nvidia GeForce GT 330

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Lower TDP 75W vs 127W More than 40% lower TDP

Benchmarks Real world tests of Radeon HD 6850 vs GeForce GT 330

Cloud Gate Factor Data courtesy FutureMark

Features Key features of the Radeon HD 6850  vs GeForce GT 330 

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

Radeon HD 6850
128 GB/s
GeForce GT 330
16.32 GB/s

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

Radeon HD 6850
24.8 GPixel/s
GeForce GT 330
8 GPixel/s

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

Radeon HD 6850
37.2 GTexel/s
GeForce GT 330
24 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6850
1,488 GFLOPS
GeForce GT 330
240 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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