GeForce 840M 

Released March, 2014
  • 1 GHz
  • 1 GB DDR3
7 Out of 10

Explore 29 laptops with the GeForce 840M
These chips are still based on Kepler (600-series), but feature more CUDA cores, more memory, a wider memory bus, and faster clockspeeds.
by Tim-Verry (Jun, 2013)
We're not sure exactly how this is done, but it's essentially a GPU version of the Turbo Boost and Turbo Core technologies we've seen from Intel and AMD CPUs for some time.
by Dustin-Sklavos (Mar, 2012)

GPUBoss Review Our evaluation of the GeForce 840M among Laptop GPUs under 35W TDP

Gaming

GeForce 840M
5.6
Battlefield 3, Battlefield 4, Bioshock Infinite and 21 more

Graphics

GeForce 840M
9.3
T-Rex, Manhattan and Cloud Gate Factor

Computing

GeForce 840M
7.9
Face Detection, Ocean Surface Simulation and 3 more

Performance per Watt

GeForce 840M
6.5
Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Value

GeForce 840M
5.8
Battlefield 3, Battlefield 4, Bioshock Infinite and 30 more

Noise and Power

GeForce 840M
5.0
TDP, Idle Power Consumption, Load Power Consumption and 2 more

7

Overall Score

GeForce 840M
7.0

Benchmarks Real world tests of the GeForce 840M

Bitcoin mining Data courtesy CompuBench

GeForce 840M
90.74 mHash/s
GeForce 920M
39.89 mHash/s
GeForce 940M
101.35 mHash/s

Face detection Data courtesy CompuBench

GeForce 840M
22.25 mPixels/s
GeForce 920M
8.35 mPixels/s
GeForce 940M
25.27 mPixels/s

T-Rex (GFXBench 3.0) Data courtesy CompuBench

GeForce 840M
3,359.61
GeForce 940M
2,003.78
GeForce 920M
3,365.32

Manhattan (GFXBench 3.0) Data courtesy CompuBench

GeForce 840M
3,718.04
GeForce 940M
1,746.08
GeForce 920M
3,710.28

Fire Strike Factor Data courtesy FutureMark

GeForce 840M
12.23
GeForce 940M
17.26
GeForce 920M
10.33

Sky Diver Factor Data courtesy FutureMark

GeForce 840M
118.17
GeForce 940M
172.58
GeForce 920M
97.86

Thief

GeForce 840M
9.1

Battlefield 4

GeForce 840M
11.2

In The News From around the web

19
Mar

NVIDIA Announces Quadro M6000 & Quadro VCA (2015)

by Ryan Smith |
www.anandtech.com
However the company is also pushing the use of Physically Based Rendering (PBR), a compute-intensive rendering solution that uses far more accurate rendering algorithms to accurately model the physical characteristic of a material, in essence properly capturing how light will interact with that material and reflect off of it rather than using a rough approximation.
However as FP64 compute is not widely used in graphics, this is not something NVIDIA believes will be an issue.
17
Dec

Roadmap reveals Nvidia's Geforce 800M mobile lineup

by Slobodan Simic |
www.fudzilla.com
Although it is not clear if OEMs like Clevo will get it in February or we will actually see some notebook with new Nvidia Geforce 800M parts on retail/e-tail shelves in February, we are quite sure we will hear more about them during CES 2014.
The high-end lineup includes the GTX 880M and the GTX 870M and according to Clevo's roadmap, the GTX 880M and the GTX 860M will show up in a couple of Clevo notebook models running in SLI configuration.
Nvidia would also most probably release a 880M SLI Configuration which would be the king of mobile graphics for a year or so.
Details about Maxwell’s Mobility series surfaced a few days back and now predicted benchmarks have also surfaced.
So let’s talk about the GPUs themselves, NVIDIA’s first tier chips would be MXM design which means they would be interchangeable, upgradable and even offer SLI support on some notebook designs.
Next up, we have the entry level models which will feature the onboard design which mean that these GPUs will be permanently soldered to the mainboard hence no upgrading can be possible.

Specifications Full list of technical specs

gpu

GPU brand Nvidia
GPU name GM108
Market Laptop
Clock speed 1,029 MHz
Turbo clock speed 1,124 MHz
Is dual GPU No
Reference card None

raw performance

Shading units 384
Texture mapping units 16
Render output processors 8
Pixel rate 8.23 GPixel/s
Texture rate 16.46 GTexel/s
Floating-point performance 790.3 GFLOPS

memory

Memory clock speed 1,001 MHz
Effective memory clock speed 2,002 MHz
Memory bus 64 bit
Memory 1,024 MB
Memory type DDR3
Memory bandwidth 16.02 GB/s

noise and power

TDP 33W
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Comments

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Geforce 840m has 2GB DDR3 RAM and it's RAM is not 1GB !!!
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