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Differences What are the advantages of each

Front view of Radeon HD 7870M

Reasons to consider the
AMD Radeon HD 7870M

Report a correction
More memory 2,048 MB vs 1,024 MB 2x more memory
Lower TDP 45W vs 75W 40% lower TDP
Front view of Radeon HD 6970M Rebrand

Reasons to consider the
AMD Radeon HD 6970M Rebrand

Report a correction
Slightly better floating-point performance 1,280 GFLOPS vs 1,024 GFLOPS 25% better floating-point performance
Slightly more shading units 800 vs 640 160 more shading units

Features Key features of the Radeon HD 7870M  vs 6970M Rebrand 

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

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

Radeon HD 7870M
12.8 GPixel/s
Radeon HD 6970M Rebrand
12.8 GPixel/s

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

Radeon HD 7870M
32 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 7870M
1,024 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 7870M  vs
6970M Rebrand 
GPU brand AMD AMD
GPU name Heathrow Broadway
Market Laptop Laptop
Clock speed 800 MHz 800 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 640 800
Texture mapping units 40 40
Render output processors 16 16
Compute units 10 10
Pixel rate 12.8 GPixel/s 12.8 GPixel/s
Texture rate 32 GTexel/s 32 GTexel/s
Floating-point performance 1,024 GFLOPS 1,280 GFLOPS

memory

Radeon HD 7870M  vs
6970M Rebrand 
Memory clock speed 1,000 MHz 1,000 MHz
Effective memory clock speed 4,000 MHz 4,000 MHz
Memory bus 128 bit 128 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 64 GB/s 64 GB/s

noise and power

TDP 45W 75W

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