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Differences What are the advantages of each

Front view of Radeon HD 4850

Reasons to consider the
ATi Radeon HD 4850

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Higher memory bandwidth 63.55 GB/s vs 16.32 GB/s Around 4x higher memory bandwidth
Higher clock speed 625 MHz vs 500 MHz 25% higher clock speed
Higher effective memory clock speed 1,986 MHz vs 1,020 MHz Around 95% higher effective memory clock speed
Significantly better cloud gate factor score 12.95 vs 6.8 More than 90% better cloud gate factor score
Better floating-point performance 1,000 GFLOPS vs 240 GFLOPS Around 4.2x better floating-point performance
More shading units 800 vs 96 704 more shading units
Significantly higher memory clock speed 993 MHz vs 510 MHz Around 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 110W More than 30% lower TDP

Benchmarks Real world tests of Radeon HD 4850 vs GeForce GT 330

Cloud Gate Factor Data courtesy FutureMark

Features Key features of the Radeon HD 4850  vs GeForce GT 330 

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

Radeon HD 4850
63.55 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 4850
10 GPixel/s
GeForce GT 330
8 GPixel/s

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

Radeon HD 4850
25 GTexel/s
GeForce GT 330
24 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 4850
1,000 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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