The NVIDIA GeForce GTX 670MX SLI is a high-end DirectX 11-compatible graphics card for laptops, consisting of two GeForce GTX 670MX. Each card has a 28nm GK104 core based on the Kepler architecture. With SLI, each card usually renders a single frame (AFR mode). Therefore, it may suffer from micro stuttering in low fps ranges of 30fps. This happens because of different timespans between two frames (e.g., irregular delays between sequential frames).


The Kepler architecture is the successor to the Fermi architecture that first appeared in laptops with the GeForce 400M series. The GK106 Kepler core offers five shader blocks, called SMX, that are clocked at the same speed as the central core. In the GTX 670MX, all 5 blocks are active leading to the 960 CUDA cores. Although more shader cores are available in the Kepler architecture as compared to the Fermi design, the Kepler shaders are still expected to be up to twice as power efficient. However, due to the missing hot clock of the shader domain, two shaders of a Kepler chip are of similar speed to one shader of a Fermi chip (as the latter is clocked twice as fast). PCIe 3.0 is now supported by the mobile Kepler series and an optional Turbo mode can automatically overclock the Nvidia card by a theoretical 15 percent if the laptop cooling system allows it. The implementation of this boost mode is done in the BIOS, but it is ultimately dependent upon the manufacturer of the laptop.


The graphics performance of the GeForce GTX 670MX SLI depends on the driver support of the benchmark / game. Ideally it can be up to twice as fast as a single GTX 670MX, ranking it as one of the fastest mobile graphics solution for laptops in 2012. The performance should be on average similar to a single GTX 680M, but with the problems of micro stuttering (see above) and a higher power consumption. The GPUs have enough power to run games of 2012 fluently with Full HD resolution, maxed out graphical settings and antialiasing. Even extremely demanding titles like Metro 2033, Alan Wake or Risen 2 are playable at the highest detail settings.


The improved feature set now includes support for up to 4 active displays. Furthermore, high resolution monitors of up to 3840x2160 pixels can now be connected using DisplayPort 1.2 or HDMI 1.4a if available. HD-Audio codecs, such as Dolby TrueHD and DTS-HD, can be transmitted via bitstream mode through the HDMI port. However, as most laptops will feature Optimus, the integrated GPU will likely have direct control over the display ports and may limit the feature set available by the Nvidia Kepler cards.

The 5th generation PureVideo HD video processor (VP5) is also integrated in the GK104 core and offers hardware decoding of HD videos. Common codecs such as MPEG-1/2, MPEG-4 ASP, H.264 and VC1/WMV9 are fully supported up to 4K resolutions while VC1 and MPEG-4 are supported up to 1080p. Two streams can be decoded in parallel for features such as Picture-in-Picture. Another novelty is the inclusion of a dedicated video encoding engine similar to Intel QuickSync that can be accessed by the NVENC API.

Power Consumption

The power consumption of the GeForce GTX 670MX SLI should double compared to a single GTX 670MX. Therefore, only large desktop replacements can handle the heat.

GeForce GTX 600M Series
GeForce GTX 680M SLI (compare) 2688 @ 720 MHz2x 256 Bit @ 3600 MHz
GeForce GTX 680MX (compare) 1536 @ 720 MHz256 Bit @ 5000 MHz
GeForce GTX 675M SLI (compare) 768 @ 620 MHz256 Bit @ 3000 MHz
GeForce GTX 680M (compare) 1344 @ 720 MHz256 Bit @ 3600 MHz
GeForce GTX 670MX SLI 1920 @ 600 MHz2x 192 Bit @ 2800 MHz
GeForce GTX 675MX (compare) 960 @ 600 MHz256 Bit @ 3600 MHz
GeForce GTX 675M (compare) 384 @ 620 MHz256 Bit @ 3000 MHz
GeForce GTX 670MX (compare) 960 @ 600 MHz192 Bit @ 2800 MHz
GeForce GTX 670M (compare) 336 @ 598 MHz192 Bit @ 3000 MHz
GeForce GTX 660M (compare) 384 @ 835 MHz128 Bit @ 4000 MHz
Pipelines1920 - unified
Core Speed600 MHz
Memory Speed2800 MHz
Memory Bus Width2x 192 Bit
Memory TypeGDDR5
Shared Memoryno
DirectXDirectX 11, Shader 5.1
Transistor Count5080 Million
technology28 nm
FeaturesOptimus, SLI, PhysX, Verde Drivers, CUDA, 3D Vision, 3DTV Play
Notebook Sizelarge
Date of Announcement01.10.2012
Link to Manufacturer Page


3DMark Vantage
P Result 1280x1024 +
P GPU no PhysX 1280x1024 +
3DMark 03 - Standard 1024x768
78213 Points (43%)
3DMark 05 - Standard 1024x768
29851 Points (64%)
3DMark 06 Standard 1280x1024 +
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
87.2 fps (39%)
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 +
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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.

Far Cry 3

Far Cry 3

low 1024x768
107.7  fps    + Compare
med. 1366x768
97.7  fps    + Compare
high 1366x768
72.1  fps    + Compare
ultra 1920x1080
27  fps    + Compare
» With all tested laptops playable in detail settings high.
med. 1366x768
57.7  fps    + Compare
high 1366x768
55.7  fps    + Compare
ultra 1920x1080
31.2  fps    + Compare
» With all tested laptops playable in detail settings high.
low 1024x768
67.6  fps    + Compare
med. 1366x768
62.7  fps    + Compare
high 1366x768
53.3  fps    + Compare
ultra 1920x1080
24.7  fps    + Compare
» With all tested laptops playable in detail settings high.
low 1024x768
185.9  fps    + Compare
med. 1366x768
171.7  fps    + Compare
high 1366x768
124.4  fps    + Compare
ultra 1920x1080
85.7  fps    + Compare
» With all tested laptops playable in detail settings ultra.
low 1024x768
59.6  fps    + Compare
med. 1366x768
59.4  fps    + Compare
high 1366x768
48.8  fps    + Compare
ultra 1920x1080
29  fps    + Compare
» With all tested laptops playable in detail settings high.
low 1024x768
151.3  fps    + Compare
med. 1366x768
128.9  fps    + Compare
high 1366x768
113.2  fps    + Compare
ultra 1920x1080
47.2  fps    + Compare
» With all tested laptops playable in detail settings ultra.
low 1024x768
129  fps    + Compare
med. 1366x768
129.3  fps    + Compare
high 1366x768
129.4  fps    + Compare
ultra 1920x1080
126.6  fps    + Compare
» With all tested laptops playable in detail settings ultra.