GPUBoss Review Our evaluation of 660M vs 840M among Laptop 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

Value

Battlefield 3, Battlefield 4, Bioshock Infinite and 32 more

Noise and Power

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

No winner declared

Too close to call

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VS

Differences What are the advantages of each

Front view of GeForce GTX 660M

Reasons to consider the
Nvidia GeForce GTX 660M

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Much better 3DMark06 score 14,704 vs 2,338 More than 6.2x better 3DMark06 score
Better PassMark score 1,412 vs 879 More than 60% better PassMark score
Higher effective memory clock speed 4,000 MHz vs 2,002 MHz Around 2x higher effective memory clock speed
Much higher diablo III framerate 67 fps vs 17.7 fps More than 3.8x higher diablo III framerate
Better 3DMark vantage graphics score 9,803 vs 6,627 Around 50% better 3DMark vantage graphics score
Higher memory bandwidth 64 GB/s vs 16.02 GB/s Around 4x higher memory bandwidth
Much higher battlefield 4 framerate 35.45 vs 11.2 Around 3.2x higher battlefield 4 framerate
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher crysis 3 framerate 10 fps vs 6.3 fps Around 60% higher crysis 3 framerate
More render output processors 16 vs 8 Twice as many render output processors
Wider memory bus 128 bit vs 64 bit 2x wider memory bus
More texture mapping units 32 vs 16 Twice as many texture mapping units
Higher BioShock infinite framerate 22.9 fps vs 13.5 fps Around 70% higher BioShock infinite framerate
Front view of GeForce 840M

Reasons to consider the
Nvidia GeForce 840M

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Better 3DMark 11 graphics score 10,332 vs 2,369 More than 4.2x better 3DMark 11 graphics score
Higher clock speed 1,029 MHz vs 835 MHz Around 25% higher clock speed
Significantly better T-Rex score 3,359.62 vs 3,353.58 Almost the same
Higher turbo clock speed 1,124 MHz vs 950 MHz Around 20% higher turbo clock speed
Better particle simulation score 184.99 mInteraction/s vs 141.21 mInteraction/s More than 30% better particle simulation score
Slightly lower TDP 33W vs 50W Around 35% lower TDP

Benchmarks Real world tests of GeForce GTX 660M vs 840M

Bitcoin mining Data courtesy CompuBench

GeForce GTX 660M
33.75 mHash/s
GeForce 840M
94.68 mHash/s

Face detection Data courtesy CompuBench

GeForce GTX 660M
10.84 mPixels/s
GeForce 840M
22.54 mPixels/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GTX 660M
3,353.58
GeForce 840M
3,359.62

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce GTX 660M
3,709.34
GeForce 840M
1,855.62

Fire Strike Factor Data courtesy FutureMark

Sky Diver Factor Data courtesy FutureMark

Battlefield 4

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