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NVIDIA GeForce 840M

NVIDIA GeForce 840M

The NVIDIA GeForce 840M is a mid-range DirectX 12-compatible graphics card for laptops unveiled in March 2014. It is one of the first cards based on Nvidia's new Maxwell architecture (GM108 chip), but is still manufactured in 28 nm. The 840M offers 384 shader units clocked at 1029 MHz (+ Boost) as well as 2 GB of DDR3 memory (64 bit, 2000 MHz effective).

Architecture

Compared to Kepler, Maxwell has been optimized in several details to increase power efficiency. Smaller Streaming Multiprocessors (SMM) with only 128 ALUs (Kepler: 192) and an optimized scheduler should lead to better utilization of the shaders. Nvidia promises that a Maxwell SMM with 128 ALUs can offer 90 percent of the performance of a Kepler SMX with 192 ALUs. GM108 features 3 SMMs and thus 384 shader cores, 24 TMUs and 8 ROPs (64-bit interface).

Another optimization is the massively enlarged L2 cache. The larger size can process some of the memory traffic to allow for a relatively narrow memory interface without significantly reducing performance.

Similar to Fermi and Kepler, the GM107/GM108 support DirectX 12 with feature level 11_0 only.

Performance

According to our benchmarks, the GeForce 840M is about 30 percent faster than the old GT 740M and just slightly behind a GeForce GT 750M (DDR3 version). Many games of 2013/2014 can be played fluently in WXGA resolution (1366 x 768) and medium or high detail settings. However, very demanding games such as Crysis 3 or Battlefield 4 will require lower resolutions and/or details.

Features

GM108 integrates the sixth generation of the PureVideo HD video engine (VP6), offering a better decoding performance for H.264 and MPEG-2 videos. Of course, VP6 supports all features of previous generations (4K support, PIP, video encoding via NVENC API). Unfortunately, HDMI 2.0 is still not supported.

Power Consumption

The power consumption of the GeForce 840M should be about 30 Watts or lower. Therefore, the GPU is best suited for laptops 13 - 14 inches in size and above. The 800M series also supports Optimus to automatically switch between an integrated graphics card and the Nvidia GPU.

ManufacturerNVIDIA
GeForce 800M Series
GeForce 845M 384 @ 1071 - 1150 (Boost) MHz64/128 Bit @ 2000 - 5000 MHz
GeForce 840M 384 @ 1029 MHz64 Bit @ 2000 MHz
GeForce 830M 256 @ 1029 - 1150 (Boost) MHz64 Bit @ 1800 MHz
GeForce 825M 384 @ 850 MHz64 Bit @ 1800 MHz
GeForce 820M 96 @ 775 MHz64 Bit @ 1800 MHz
CodenameN15S-GT
ArchitectureMaxwell
Pipelines384 - unified
Core Speed *1029 MHz
Memory Speed *2000 MHz
Memory Bus Width64 Bit
Memory TypeDDR3
Max. Amount of Memory4096 MB
Shared Memoryno
DirectXDirectX 12 (FL 11_0), Shader 5.0
technology28 nm
FeaturesGPU Boost 2.0, Optimus, PhysX, CUDA, GeForce Experience
Notebook Sizemedium sized
Date of Announcement12.03.2014
Link to Manufacturer Pagehttp://www.nvidia.de/object/geforce-800m...
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

Cinebench R15
Ref. Match 64Bit +
OpenGL 64Bit +
GFXBench (DX / GLBenchmark) 2.7
T-Rex HD Offscreen C24Z16 1920x1080 +
T-Rex HD Onscreen C24Z16 +
3DMark - Fire Strike Graphics 1920x1080
0%
100%
min: 1471     avg: 1572.2 (4%)     median: 1573 (4%)     max: 1713 Points
3DMark - Fire Strike Score 1920x1080
0%
100%
min: 1286     avg: 1375.5 (6%)     median: 1361 (6%)     max: 1595 Points
3DMark - Cloud Gate Standard Graphics 1280x720
0%
100%
min: 7985     avg: 8812.9 (5%)     median: 8723.5 (5%)     max: 9691 Points
3DMark - Cloud Gate Standard Score 1280x720
0%
100%
min: 4600     avg: 5952.3 (16%)     median: 5829 (16%)     max: 8314 Points
3DMark - Ice Storm Standard Graphics 1280x720
0%
100%
min: 39342     avg: 59791.9 (8%)     median: 54117 (7%)     max: 87016 Points
Unigine Heaven 3.0 - DX 11, Normal Tessellation, High Shaders 1920x1080
0%
100%
min: 22.5     avg: 22.5 (8%)     median: 22.5 (8%)     max: 22.5 fps
ComputeMark v2.1 - Normal, Score 1024x600
0%
100%
min: 1671     avg: 1674 (8%)     median: 1674 (8%)     max: 1677 Points
LuxMark v2.0 64Bit - Room GPUs-only
0%
100%
min: 337     avg: 356.7 (7%)     median: 359 (7%)     max: 374 Samples/s
LuxMark v2.0 64Bit - Sala GPUs-only
0%
100%
min: 616     avg: 647.7 (6%)     median: 651 (6%)     max: 676 Samples/s
3DMark 11 - Performance GPU 1280x720
0%
100%
min: 0     avg: 2286.5 (4%)     median: 2338 (5%)     max: 2511 points
3DMark 11 - Performance 1280x720
0%
100%
min: 0     avg: 2328.8 (9%)     median: 2378 (9%)     max: 2683 points
3DMark Vantage
P GPU no PhysX 1280x1024 +
P Result 1280x1024 +
3DMark 06 Standard 1280x1024 +
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
0%
100%
min: 30.1     avg: 30.1 (13%)     median: 30.1 (13%)     max: 30.1 fps
SPECviewperf 12
Solidworks (sw-03) 1900x1060 +
Siemens NX (snx-02) 1900x1060 +
Showcase (showcase-01) 1900x1060 +
Medical (medical-01) 1900x1060 +
Maya (maya-04) 1900x1060 +
Energy (energy-01) 1900x1060 +
Creo (creo-01) 1900x1060 +
Catia (catia-04) 1900x1060 +
SPECviewperf 11
Siemens NX 1920x1080 +
Tcvis 1920x1080 +
SolidWorks 1920x1080 +
Pro/ENGINEER 1920x1080 +
Maya 1920x1080 +
Lightwave 1920x1080 +
Ensight 1920x1080 +
Catia 1920x1080 +
Cinebench R11.5 OpenGL 64Bit +
Cinebench R10 Shading 32Bit +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

Game Benchmarks

The following benchmarks stem from our benchmarks of review laptops. The performance depends on the used graphics memory, clock rate, processor, system settings, drivers, and operating systems. So the results don't have to be representative for all laptops with this GPU. For detailled information on the benchmark results, click on the fps number.

FIFA 16

FIFA 16

2015
low 1280x720
88.5  fps    + Compare
high 1366x768
57.9  fps    + Compare
ultra 1920x1080
38.5  fps    + Compare
» With all tested laptops playable in detail settings ultra.
World of Warships
low 1366x768
103.4  fps    + Compare
med. 1366x768
78.1  fps    + Compare