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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 higher memory bandwidth 105.98 GB/s vs 16.32 GB/s Around 6.5x higher memory bandwidth
Higher clock speed 669 MHz vs 500 MHz Around 35% higher clock speed
Much wider memory bus 512 bit vs 128 bit 4x wider memory bus
Higher effective memory clock speed 1,656 MHz vs 1,020 MHz More than 60% higher effective memory clock speed
Slightly more memory 1,024 MB vs 256 MB 4x more memory
Better floating-point performance 856.4 GFLOPS vs 240 GFLOPS More than 3.5x better floating-point performance
Higher pixel rate 21.4 GPixel/s vs 8 GPixel/s Around 2.8x higher pixel rate
More render output processors 32 vs 16 Twice as many render output processors
More shading units 640 vs 96 544 more shading units
Higher memory clock speed 828 MHz vs 510 MHz More than 60% higher memory clock speed
Front view of GeForce GT 330

Reasons to consider the
Nvidia GeForce GT 330

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More texture mapping units 48 vs 32 16 more texture mapping units
Lower TDP 75W vs 140W More than 45% lower TDP

Features Key features of the Radeon HD 3850 X2  vs GeForce GT 330 

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

Radeon HD 3850 X2
105.98 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 3850 X2
21.4 GPixel/s
GeForce GT 330
8 GPixel/s

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

Radeon HD 3850 X2
21.4 GTexel/s
GeForce GT 330
24 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3850 X2
856.4 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

Specifications Full list of technical specs

gpu

Radeon HD 3850 X2  vs
GeForce GT 330 
GPU brand ATI Nvidia
GPU name RV670 G92
Market Desktop Desktop
Clock speed 669 MHz 500 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 640 96
Texture mapping units 32 48
Render output processors 32 16
Pixel rate 21.4 GPixel/s 8 GPixel/s
Texture rate 21.4 GTexel/s 24 GTexel/s
Floating-point performance 856.4 GFLOPS 240 GFLOPS

memory

Radeon HD 3850 X2  vs
GeForce GT 330 
Memory clock speed 828 MHz 510 MHz
Effective memory clock speed 1,656 MHz 1,020 MHz
Memory bus 512 bit 128 bit
Memory 1,024 MB 256 MB
Memory type GDDR3 DDR2
Memory bandwidth 105.98 GB/s 16.32 GB/s

noise and power

TDP 140W 75W

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