GPUBoss Review Our evaluation of 6400 vs 640M among all GPUs


Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more


T-Rex, Manhattan, Cloud Gate Factor, Sky Diver Factor and 1 more


Face Detection, Ocean Surface Simulation and 3 more

Performance per Watt

Battlefield 3, Battlefield 4, Bioshock Infinite and 32 more

Noise and Power

TDP, Idle Power Consumption, Load Power Consumption and 2 more


Overall Score

AMD Radeon HD 6400 

GPUBoss recommends the AMD Radeon HD 6400  based on its .

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Differences What are the advantages of each

Front view of Radeon HD 6400

Reasons to consider the
AMD Radeon HD 6400

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Slightly lower TDP 18W vs 32W Around 45% lower TDP
Front view of GeForce GT 640M

Reasons to consider the
Nvidia GeForce GT 640M

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More memory 2,048 MB vs 512 MB 4x more memory
More render output processors 16 vs 4 12 more render output processors
Better manhattan score 3,590.88 vs 803.03 Around 4.5x better manhattan score
More texture mapping units 32 vs 8 24 more texture mapping units
Slightly higher memory clock speed 900 MHz vs 800 MHz Around 15% higher memory clock speed

Benchmarks Real world tests of Radeon HD 6400 vs GeForce GT 640M

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 6400
GeForce GT 640M

Manhattan (GFXBench 3.0) Data courtesy CompuBench

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