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Differences What are the advantages of each

Front view of Radeon HD 8870M

Reasons to consider the
AMD Radeon HD 8870M

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Significantly better 3DMark 11 graphics score 15,675 vs 5,645 More than 2.8x better 3DMark 11 graphics score
Significantly better manhattan score 3,715.76 vs 2,350.05 Around 60% better manhattan score
Front view of Radeon HD 7970M

Reasons to consider the
AMD Radeon HD 7970M

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Much higher dead space 3 framerate 92.3 fps vs 46.2 fps Around 2x higher dead space 3 framerate
Much better 3DMark06 score 22,370.5 vs 2,986 Around 7.5x better 3DMark06 score
Better PassMark score 3,768 vs 1,799 More than 2x better PassMark score
Better 3DMark vantage graphics score 21,507 vs 10,181.5 More than 2x better 3DMark vantage graphics score
Significantly higher memory bandwidth 153.6 GB/s vs 72 GB/s Around 2.2x higher memory bandwidth
Higher clock speed 850 MHz vs 725 MHz More than 15% higher clock speed
Better floating-point performance 2,176 GFLOPS vs 992 GFLOPS Around 2.2x better floating-point performance
Much higher diablo III framerate 94.1 fps vs 54.2 fps Around 75% higher diablo III framerate
Higher texture rate 68 GTexel/s vs 31 GTexel/s Around 2.2x higher texture rate
Higher pixel rate 27.2 GPixel/s vs 12.4 GPixel/s Around 2.2x higher pixel rate
More shading units 1,280 vs 640 Twice as many shading units
More texture mapping units 80 vs 40 Twice as many texture mapping units
More render output processors 32 vs 16 Twice as many render output processors
Significantly wider memory bus 256 bit vs 128 bit 2x wider memory bus
More compute units 20 vs 10 Twice as many compute units
Better fire strike factor score 46.23 vs 16.47 More than 2.8x better fire strike factor score
Better face detection score 51.14 mPixels/s vs 24.1 mPixels/s More than 2x better face detection score
Higher BioShock infinite framerate 43.7 fps vs 19.3 fps More than 2.2x higher BioShock infinite framerate
Higher crysis 3 framerate 20.3 vs 10.1 More than 2x higher crysis 3 framerate
Higher crysis 3 framerate 20.3 fps vs 10.1 fps More than 2x higher crysis 3 framerate
Better PassMark direct compute score 1,957 vs 1,108 More than 75% better PassMark direct compute score
Slightly higher memory clock speed 1,200 MHz vs 1,125 MHz More than 5% higher memory clock speed

Benchmarks Real world tests of Radeon HD 8870M vs 7970M

Bitcoin mining Data courtesy CompuBench

Radeon HD 8870M
106.85 mHash/s
Radeon HD 7970M
254.36 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 8870M
24.1 mPixels/s
Radeon HD 7970M
51.14 mPixels/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Manhattan (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 8870M
3,715.76
Radeon HD 7970M
2,350.05

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Battlefield 4

Bioshock Infinite

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