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Differences What are the advantages of each

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 900 MHz More than 10% higher clock speed
Higher memory bandwidth 128 GB/s vs 98.5 GB/s Around 30% higher memory bandwidth
Better floating-point performance 1,600 GFLOPS vs 691.2 GFLOPS More than 2.2x better floating-point performance
More shading units 800 vs 192 608 more shading units
Higher pixel rate 16 GPixel/s vs 7.2 GPixel/s Around 2.2x higher pixel rate
Wider memory bus 256 bit vs 192 bit Around 35% wider memory bus
Front view of GeForce GTX 550 Ti

Reasons to consider the
Nvidia GeForce GTX 550 Ti

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Significantly better sky diver factor score 136.02 vs 2.27 Around 60x better sky diver factor score
More render output processors 24 vs 16 8 more render output processors
Lower TDP 116W vs 190W Around 40% lower TDP

Benchmarks Real world tests of Radeon HD 4890 vs GeForce GTX 550 Ti

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Sky Diver Factor Data courtesy FutureMark

Cloud Gate Factor Data courtesy FutureMark

Reviews Word on the street

Radeon HD 4890  vs GeForce GTX 550 Ti 

8.7
8.8
GPU overclock is excellent with 1065 MHz.
GeForce GTX 550 Ti

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