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Differences What are the advantages of each

Front view of Radeon R9 M280X

Reasons to consider the
AMD Radeon R9 M280X

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Slightly more memory 4,096 MB vs 3,072 MB Around 35% more memory
Front view of Radeon R9 280X

Reasons to consider the
Generic Radeon R9 280X

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Much better 3DMark06 score 28,452 vs 4,698 More than 6x better 3DMark06 score
Significantly higher memory bandwidth 288 GB/s vs 88 GB/s More than 3.2x higher memory bandwidth
Better floating-point performance 4,096 GFLOPS vs 1,792 GFLOPS More than 2.2x better floating-point performance
Higher texture rate 128 GTexel/s vs 56 GTexel/s More than 2.2x higher texture rate
More shading units 2,048 vs 896 1152 more shading units
More texture mapping units 128 vs 56 72 more texture mapping units
Higher pixel rate 32 GPixel/s vs 16 GPixel/s 2x higher pixel rate
More compute units 32 vs 14 18 more compute units
More render output processors 32 vs 16 Twice as many render output processors
Significantly higher BioShock infinite framerate 73.9 fps vs 26.5 fps More than 2.8x higher BioShock infinite framerate
Higher metro: last light framerate 36.45 vs 19 More than 90% higher metro: last light framerate
Wider memory bus 384 bit vs 128 bit 3x wider memory bus
Higher memory clock speed 1,500 MHz vs 1,375 MHz Around 10% higher memory clock speed

Benchmarks Real world tests of Radeon R9 M280X vs 280X

3DMark 11 Graphics Industry standard benchmark that tests DirectX 11 GPU performance

Battlefield 4

Bioshock Infinite

Crysis 3

Metro: Last Light

BioShock Infinite 1920 x 1080 - Ultra preset + DX11 (DDOF)

Radeon R9 M280X
26.5 fps
Radeon R9 280X
73.9 fps

Crysis 3 1920 x 1080 - Very High preset + 16xAF + 2xSMAA

Radeon R9 M280X
13.1 fps
Radeon R9 280X
13.1 fps

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