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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
Higher clock speed 669 MHz vs 518 MHz Around 30% higher clock speed
More shading units 640 vs 192 448 more shading units
Slightly higher pixel rate 21.4 GPixel/s vs 14.5 GPixel/s Around 50% higher pixel rate
Wider memory bus 512 bit vs 448 bit Around 15% wider memory bus
Lower TDP 140W vs 182W Around 25% lower TDP
Front view of GeForce GTX 260

Reasons to consider the
Nvidia GeForce GTX 260

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Slightly more memory 1,792 MB vs 1,024 MB 75% more memory
Slightly higher effective memory clock speed 2,016 MHz vs 1,656 MHz More than 20% higher effective memory clock speed
More texture mapping units 64 vs 32 Twice as many texture mapping units
Higher memory clock speed 1,008 MHz vs 828 MHz More than 20% higher memory clock speed

Features Key features of the Radeon HD 3850 X2  vs GeForce GTX 260 

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 260
112.9 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 260
14.5 GPixel/s

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

Radeon HD 3850 X2
21.4 GTexel/s
GeForce GTX 260
33.15 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3850 X2
856.4 GFLOPS
GeForce GTX 260
414.7 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 GTX 260 
GPU brand ATI Nvidia
GPU name RV670 GT200B
Market Desktop Desktop
Clock speed 669 MHz 518 MHz
Is dual GPU Yes No
Reference card None Nvidia GeForce GTX 260 576 MHz 896 MB

raw performance

Shading units 640 192
Texture mapping units 32 64
Render output processors 32 28
Pixel rate 21.4 GPixel/s 14.5 GPixel/s
Texture rate 21.4 GTexel/s 33.15 GTexel/s
Floating-point performance 856.4 GFLOPS 414.7 GFLOPS

memory

Radeon HD 3850 X2  vs
GeForce GTX 260 
Memory clock speed 828 MHz 1,008 MHz
Effective memory clock speed 1,656 MHz 2,016 MHz
Memory bus 512 bit 448 bit
Memory 1,024 MB 1,792 MB
Memory type GDDR3 GDDR3
Memory bandwidth 105.98 GB/s 112.9 GB/s

noise and power

TDP 140W 182W

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