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Differences What are the advantages of each

Front view of Radeon HD 7950 Mac

Reasons to consider the
AMD Radeon HD 7950 Mac

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Much higher memory bandwidth 240 GB/s vs 76.8 GB/s Around 3.2x higher memory bandwidth
More memory 3,072 MB vs 1,024 MB 3x more memory
Better floating-point performance 2,867.2 GFLOPS vs 1,360 GFLOPS More than 2x better floating-point performance
Higher texture rate 89.6 GTexel/s vs 34 GTexel/s Around 2.8x higher texture rate
Significantly more texture mapping units 112 vs 40 72 more texture mapping units
Significantly more shading units 1,792 vs 800 992 more shading units
Much wider memory bus 384 bit vs 128 bit 3x wider memory bus
Significantly more compute units 28 vs 10 18 more compute units
Significantly better video composition score 81.68 frames/s vs 28.22 frames/s Around 3x better video composition score
More render output processors 32 vs 16 Twice as many render output processors
Higher pixel rate 25.6 GPixel/s vs 13.6 GPixel/s Around 90% higher pixel rate
Front view of Radeon HD 5770

Reasons to consider the
ATi Radeon HD 5770

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Significantly lower TDP 108W vs 200W More than 45% lower TDP

Benchmarks Real world tests of Radeon HD 7950 Mac vs 5770

Bitcoin mining Data courtesy CompuBench

Radeon HD 7950 Mac
370.18 mHash/s
Radeon HD 5770
122.81 mHash/s

Face detection Data courtesy CompuBench

Radeon HD 7950 Mac
67.8 mPixels/s
Radeon HD 5770
9.96 mPixels/s

Ocean surface simulation Data courtesy CompuBench

Radeon HD 7950 Mac
1,230.77 frames/s
Radeon HD 5770
461.22 frames/s

Particle simulation Data courtesy CompuBench

Radeon HD 7950 Mac
460.4 mInteraction/s
Radeon HD 5770
207.34 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

Radeon HD 7950 Mac
-1 frames/s
Radeon HD 5770
0.92 frames/s

Video composition Data courtesy CompuBench

Radeon HD 7950 Mac
81.68 frames/s
Radeon HD 5770
28.22 frames/s

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