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Differences What are the advantages of each

Front view of Radeon R9 280

Reasons to consider the
AMD Radeon R9 280

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More memory 3,072 MB vs 1,024 MB 3x more memory
Higher clock speed 827 MHz vs 775 MHz More than 5% higher clock speed
Better floating-point performance 2,964 GFLOPS vs 1,488 GFLOPS Around 2x better floating-point performance
Higher effective memory clock speed 5,000 MHz vs 4,000 MHz 25% higher effective memory clock speed
Higher texture rate 92.6 GTexel/s vs 37.2 GTexel/s Around 2.5x higher texture rate
Significantly better T-Rex score 7.95 frames/s vs 1.34 frames/s Around 6x better T-Rex score
More texture mapping units 112 vs 48 64 more texture mapping units
More shading units 1,792 vs 960 832 more shading units
More compute units 28 vs 12 16 more compute units
Higher memory clock speed 1,250 MHz vs 1,000 MHz 25% higher memory clock speed
Front view of Radeon HD 6850

Reasons to consider the
AMD Radeon HD 6850

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Lower TDP 127W vs 200W More than 35% lower TDP

Benchmarks Real world tests of Radeon R9 280 vs HD 6850

CompuBench 1.5 (Bitcoin mining)

Radeon R9 280
414.65 mHash/s
Radeon HD 6850
139.45 mHash/s

CompuBench 1.5 (Face detection)

Radeon R9 280
61.3 mPixels/s
Radeon HD 6850
12.98 mPixels/s

CompuBench 1.5 (Ocean surface simulation)

Radeon R9 280
1,212.21 frames/s
Radeon HD 6850
948.81 frames/s

CompuBench 1.5 (Particle simulation)

Radeon R9 280
553.43 mInteraction/s
Radeon HD 6850
227.8 mInteraction/s

GFXBench 3.0 (T-Rex)

Radeon R9 280
3,359.65
Radeon HD 6850
3,359.04

GFXBench 3.0 (Manhattan)

Radeon R9 280
3,717.19
Radeon HD 6850
3,679.34

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