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Differences What are the advantages of each

Front view of Radeon HD 7850

Reasons to consider the
AMD Radeon HD 7850

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Better PassMark score 3,813 vs 1,535 Around 2.5x better PassMark score
Much better sky diver factor score 293.45 vs 2.27 Around 129.5x better sky diver factor score
Higher effective memory clock speed 4,800 MHz vs 4,000 MHz 20% higher effective memory clock speed
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher memory bandwidth 153.6 GB/s vs 128 GB/s Around 20% higher memory bandwidth
More render output processors 32 vs 16 Twice as many render output processors
Higher pixel rate 27.52 GPixel/s vs 16 GPixel/s More than 70% higher pixel rate
Slightly higher texture rate 55 GTexel/s vs 40 GTexel/s Around 40% higher texture rate
More texture mapping units 64 vs 40 24 more texture mapping units
Higher memory clock speed 1,200 MHz vs 1,000 MHz 20% higher memory clock speed
More compute units 16 vs 10 6 more compute units
More shading units 1,024 vs 800 224 more shading units
Lower TDP 130W vs 190W More than 30% lower TDP
Front view of Radeon HD 4890

Reasons to consider the
XFX Radeon HD 4890

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Higher clock speed 1,000 MHz vs 860 MHz More than 15% higher clock speed

Benchmarks Real world tests of Radeon HD 7850 vs 4890

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 7850
Radeon HD 4890

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

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