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Differences What are the advantages of each

Front view of Radeon HD 7770

Reasons to consider the
AMD Radeon HD 7770

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Significantly higher clock speed 1,000 MHz vs 648 MHz Around 55% higher clock speed
Significantly higher effective memory clock speed 4,500 MHz vs 2,484 MHz More than 80% higher effective memory clock speed
Better PassMark score 2,194 vs 1,266 Around 75% better PassMark score
Better floating-point performance 1,280 GFLOPS vs 708.5 GFLOPS More than 80% better floating-point performance
Better cloud gate factor score 16.18 vs 13.51 Around 20% better cloud gate factor score
More shading units 640 vs 240 400 more shading units
Significantly lower TDP 80W vs 204W 2.5x lower TDP
Front view of GeForce GTX 285

Reasons to consider the
Nvidia GeForce GTX 285

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Significantly higher memory bandwidth 159 GB/s vs 72 GB/s Around 2.2x higher memory bandwidth
Much wider memory bus 512 bit vs 128 bit 4x wider memory bus
More render output processors 32 vs 16 Twice as many render output processors
More texture mapping units 80 vs 40 Twice as many texture mapping units
Higher memory clock speed 1,242 MHz vs 1,125 MHz More than 10% higher memory clock speed

Benchmarks Real world tests of Radeon HD 7770 vs GeForce GTX 285

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

3DMark Vantage (Texture Fill) Industry standard benchmark that tests DirectX performance

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 7770
3,355.14
GeForce GTX 285
3,358.04

Cloud Gate Factor Data courtesy FutureMark

Crysis: Warhead (2012) 1920x1200 - Frost Bench - Enthusiast Quality + 4xAA

Radeon HD 7770
20.7 fps
GeForce GTX 285
21.5 fps

SmallLux GPU 2.0d4 Measures compute performance using OpenCL to do 3D rendering

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