GPUBoss Review Our evaluation of 8400E vs 3870 X2 among all GPUs

Gaming

Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more

Graphics

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

Computing

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

6.2

Overall Score

Winner
ATi Radeon HD 3870 X2 

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

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VS

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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Much 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
Better floating-point performance 1,056 GFLOPS vs 192 GFLOPS 5.5x better floating-point performance
Slightly higher texture rate 26.4 GTexel/s vs 4.8 GTexel/s 5.5x higher texture rate
More shading units 640 vs 160 480 more shading units
Higher memory clock speed 901 MHz vs 533 MHz Around 70% higher memory clock speed
More texture mapping units 32 vs 8 24 more texture mapping units
Wider memory bus 512 bit vs 64 bit 8x wider memory bus
More compute units 8 vs 2 6 more compute units
Slightly better T-Rex score 3,336.96 vs 1,665.75 More than 2x better T-Rex score

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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