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Differences What are the advantages of each

Front view of Radeon HD 6870 X2

Reasons to consider the
AMD Radeon HD 6870 X2

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Higher clock speed 900 MHz vs 725 MHz Around 25% higher clock speed
Higher pixel rate 57.6 GPixel/s vs 46.4 GPixel/s Around 25% higher pixel rate
Front view of Radeon HD 5970

Reasons to consider the
ATi Radeon HD 5970

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Significantly more shading units 3,200 vs 2,240 960 more shading units
More texture mapping units 160 vs 112 48 more texture mapping units
Better floating-point performance 4,640 GFLOPS vs 4,032 GFLOPS More than 15% better floating-point performance
More compute units 40 vs 28 12 more compute units
Slightly higher texture rate 116 GTexel/s vs 100.8 GTexel/s More than 15% higher texture rate

Features Key features of the Radeon HD 6870 X2  vs 5970 

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

Radeon HD 6870 X2
268.8 GB/s
Radeon HD 5970
256 GB/s

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

Radeon HD 6870 X2
57.6 GPixel/s
Radeon HD 5970
46.4 GPixel/s

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

Radeon HD 6870 X2
100.8 GTexel/s
Radeon HD 5970
116 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 6870 X2
4,032 GFLOPS
Radeon HD 5970
4,640 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

Reviews Word on the street

Specifications Full list of technical specs

gpu

Radeon HD 6870 X2  vs
5970 
GPU brand AMD ATI
GPU name Barts XT Hemlock
Market Desktop Desktop
Clock speed 900 MHz 725 MHz
Is dual GPU Yes Yes
Reference card None None

raw performance

Shading units 2,240 3,200
Texture mapping units 112 160
Render output processors 64 64
Compute units 28 40
Pixel rate 57.6 GPixel/s 46.4 GPixel/s
Texture rate 100.8 GTexel/s 116 GTexel/s
Floating-point performance 4,032 GFLOPS 4,640 GFLOPS

memory

Radeon HD 6870 X2  vs
5970 
Memory clock speed 1,050 MHz 1,000 MHz
Effective memory clock speed 4,200 MHz 4,000 MHz
Memory bus 512 bit 512 bit
Memory 2,048 MB 2,048 MB
Memory type GDDR5 GDDR5
Memory bandwidth 268.8 GB/s 256 GB/s

noise and power

TDP 300W 294W

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