GPUBoss Review Our evaluation of 820M vs 940MX among Laptop GPUs under 35W TDP

Gaming

Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more

Graphics

T-Rex, Manhattan and Cloud Gate Factor

Computing

Face Detection, Ocean Surface Simulation and 3 more

Performance per Watt

Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Value

Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Noise and Power

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

8

Overall Score

Winner
Nvidia GeForce 940MX 

GPUBoss recommends the Nvidia GeForce 940MX  based on its benchmarks and compute performance.

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VS
Front view of GeForce 940MX

Nvidia GeForce 940MX

GPUBoss Winner

Differences What are the advantages of each

Front view of GeForce GT 820M

Reasons to consider the
Nvidia GeForce GT 820M

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Slightly lower TDP 15W vs 23W Around 35% lower TDP
Front view of GeForce 940MX

Reasons to consider the
Nvidia GeForce 940MX

Report a correction
Significantly higher clock speed 1,122 MHz vs 775 MHz Around 45% higher clock speed
Better PassMark score 1,225 vs 640 More than 90% better PassMark score
More memory 2,048 MB vs 1,024 MB 2x more memory
Significantly better face detection score 30.45 mPixels/s vs 6.38 mPixels/s More than 4.8x better face detection score
Better floating-point performance 861.7 GFLOPS vs 297.6 GFLOPS Around 3x better floating-point performance
Slightly higher texture rate 26.93 GTexel/s vs 12.4 GTexel/s Around 2.2x higher texture rate
More shading units 384 vs 96 288 more shading units
Better manhattan score 3,663.44 vs 3,428.68 More than 5% better manhattan score
Better PassMark direct compute score 912 vs 590 Around 55% better PassMark direct compute score
Higher memory clock speed 1,001 MHz vs 900 MHz More than 10% higher memory clock speed

Benchmarks Real world tests of GeForce GT 820M vs 940MX

Bitcoin mining Data courtesy CompuBench

GeForce GT 820M
17.75 mHash/s
GeForce 940MX
103.58 mHash/s

Face detection Data courtesy CompuBench

GeForce GT 820M
6.38 mPixels/s
GeForce 940MX
30.45 mPixels/s

Ocean surface simulation Data courtesy CompuBench

GeForce GT 820M
161.29 frames/s
GeForce 940MX
313.03 frames/s

Particle simulation Data courtesy CompuBench

GeForce GT 820M
54.69 mInteraction/s
GeForce 940MX
334.85 mInteraction/s

T-Rex (Compubench 1.5) Data courtesy CompuBench

GeForce GT 820M
0.55 frames/s
GeForce 940MX
1.85 frames/s

Video composition Data courtesy CompuBench

GeForce GT 820M
11.86 frames/s
GeForce 940MX
28.08 frames/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 820M
3,359.4
GeForce 940MX
3,362.58

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce GT 820M
3,428.68
GeForce 940MX
3,663.44

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