GPUBoss Review Our evaluation of 8400E vs 3870 X2 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

ATi Radeon HD 3870 X2 

GPUBoss recommends the ATi Radeon HD 3870 X2  based on its benchmarks.

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Differences What are the advantages of each

Front view of Radeon HD 8400E

Reasons to consider the
AMD Radeon HD 8400E

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Significantly lower TDP 25W vs 165W 6.6x lower TDP
Front view of Radeon HD 3870 X2

Reasons to consider the
ATi Radeon HD 3870 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher clock speed 825 MHz vs 600 MHz Around 40% higher clock speed
Higher memory bandwidth 115.32 GB/s vs 8.53 GB/s More than 13.5x higher memory bandwidth
Higher pixel rate 26.4 GPixel/s vs 2.4 GPixel/s 11x higher pixel rate
Significantly more render output processors 32 vs 4 28 more render output processors
Higher effective memory clock speed 1,802 MHz vs 1,066 MHz Around 70% higher effective memory clock speed
Slightly better floating-point performance 1,056 GFLOPS vs 192 GFLOPS 5.5x better floating-point performance
Better T-Rex score 3,336.96 vs 1,665.75 More than 2x better T-Rex score
Higher memory clock speed 901 MHz vs 533 MHz Around 70% higher memory clock speed
More shading units 640 vs 160 480 more shading units
Wider memory bus 512 bit vs 64 bit 8x wider memory bus
More texture mapping units 32 vs 8 24 more texture mapping units
More compute units 8 vs 2 6 more compute units

Benchmarks Real world tests of Radeon HD 8400E vs 3870 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

T-Rex (GFXBench 3.0) Data courtesy CompuBench

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