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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
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
Higher pixel rate 21.4 GPixel/s vs 12.6 GPixel/s Around 70% higher pixel rate
More shading units 640 vs 336 304 more shading units
Front view of GeForce GTX 560

Reasons to consider the
EVGA GeForce GTX 560

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Much higher effective memory clock speed 4,160 MHz vs 1,656 MHz More than 2.5x higher effective memory clock speed
Higher clock speed 900 MHz vs 669 MHz Around 35% higher clock speed
Higher memory bandwidth 133.1 GB/s vs 105.98 GB/s More than 25% higher memory bandwidth
Higher texture rate 50.4 GTexel/s vs 21.4 GTexel/s More than 2.2x higher texture rate
More texture mapping units 56 vs 32 24 more texture mapping units
Higher memory clock speed 1,040 MHz vs 828 MHz More than 25% higher memory clock speed

Features Key features of the Radeon HD 3850 X2  vs GeForce GTX 560 

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 560
133.1 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 560
12.6 GPixel/s

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

Radeon HD 3850 X2
21.4 GTexel/s
GeForce GTX 560
50.4 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3850 X2
856.4 GFLOPS
GeForce GTX 560
1,209.6 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 560 
GPU brand ATI Nvidia
GPU name RV670 GF114
Market Desktop Desktop
Clock speed 669 MHz 900 MHz
Is dual GPU Yes No
Reference card None Nvidia GeForce GTX 560 810 MHz 1 GB

raw performance

Shading units 640 336
Texture mapping units 32 56
Render output processors 32 32
Pixel rate 21.4 GPixel/s 12.6 GPixel/s
Texture rate 21.4 GTexel/s 50.4 GTexel/s
Floating-point performance 856.4 GFLOPS 1,209.6 GFLOPS

memory

Radeon HD 3850 X2  vs
GeForce GTX 560 
Memory clock speed 828 MHz 1,040 MHz
Effective memory clock speed 1,656 MHz 4,160 MHz
Memory bus 512 bit 256 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR3 GDDR5
Memory bandwidth 105.98 GB/s 133.1 GB/s

noise and power

TDP 140W 150W

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