NVIDIA GeForce GTX 675M SLI vs NVIDIA GeForce GTX 670MX SLI

NVIDIA GeForce GTX 675M SLI

► remove NVIDIA GeForce GTX 675M SLI

The NVIDIA GeForce GTX 675M SLI is a high-end graphics solution for laptops based on the two GTX 675M graphic cards in SLI mode. 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 GeForce GTX 675M SLI supports the same features as a single GTX 675M card. Therefore, it supports DirectX 11 and is produced in a 40nm fabrication process at TSMC. Technically, the GTX 675M (SLI) is completely identical to the GTX 580M (SLI).

GF114 architecture

The GF114 core is a power-optimized version of the GF104 (used in the GTX 485M), but with no architectural changes. Therefore, the performance per MHz stays the same. Nvidia, however, was able to clock the shaders higher while still remaining in the same power envelope. The GTX 675M offers all 384 shader cores in the GF114. More information on the similar GF104 architecture can be found on the GeForce GTX 485M page.

Performance

Due to the higher clock speeds, the GeForce GTX 675M SLI is faster than the GTX 485M SLI an as fast as the GTX 580M SLI. Demanding games like Crysis 2, Witcher 2, Dirt 3 or even Metro 2033 can be played in 1920x1080 with maximum details and most Antialiasing features enabled.

Features

Similar to the older GF104 chip, the GF114 also supports Bitstream HD Audio (Blu-Ray) output via HDMI. That means it can transfer, for example, Dolby True HD or DTS-HD bitstream without quality loss to a HiFi receiver.

The GTX 675M offers the PureVideo HD technology for video decoding. The included Video Processor 4 (VP4) supports feature set C and is therefore able to fully decode MPEG-1, MPEG-2, MPEG-4 Part 2 (MPEG-4 ASP - e.g., DivX or Xvid), VC-1/WMV9, and H.264 (VLD, IDCT, Motion Compensation, and Deblocking). 

Furthermore, the GPU is able to decode two 1080p streams simultaneously (e.g. for Blu-Ray Picture-in-Picture).

Through CUDA, OpenCL, and DirectCompute 2.1 support, the GeForce GTX 675M can be of help in general calculations. For example, the stream processor can encode videos considerably faster than can a fast CPU. Furthermore, physics calculations can be done by the GPU using PhysX (e.g., supported by Mafia 2 or Metro 2033). As two 675M are used for the SLI combination, one card alone can be used for PhysX and the other for rendering the game graphics.

3D Vision enables the laptop to send 3D content (3D games, 3D Web Streaming, 3D photos, 3D Blu-Rays) to a built-in 3D enabled screen or an external 3D TV (only if supported by the laptop manufacturer).

The power consumption of the GeForce GTX 675M is in the same region as the old GTX 580M, which is supposedly about 100 Watt (TDP including the MXM board and memory). Therefore, the SLI system needs up to 200 Watt using both cards. Without load, the performance is clocked at 50/100 MHz (chip/shader) in 2D mode and 200/400 in 3D mode to save power. Furthermore, a single card can be deactivated to save power.

The similar desktop GeForce GTX 580 is based on the GF110 chip and much faster in comparison. Therefore, the 675M is more closely related to the GeForce GTX 560Ti, the latter of which is still faster due to higher clock speeds.

NVIDIA GeForce GTX 670MX SLI

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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).

Architecture

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.

Performance

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.

Features

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.

NVIDIA GeForce GTX 675M SLINVIDIA GeForce GTX 670MX SLI
ManufacturerNVIDIANVIDIA
GeForce GTX 600M Series
GeForce GTX 680M SLI compare 2688 @ 0.72 GHz2x 256 Bit @ 3600 MHz
GeForce GTX 680MX compare 1536 @ 0.72 GHz256 Bit @ 5000 MHz
GeForce GTX 675M SLI 768 @ 0.62 GHz256 Bit @ 3000 MHz
GeForce GTX 680M compare 1344 @ 0.72 GHz256 Bit @ 3600 MHz
GeForce GTX 670MX SLI 1920 @ 0.6 GHz2x 192 Bit @ 2800 MHz
GeForce GTX 675MX compare 960 @ 0.6 GHz256 Bit @ 3600 MHz
GeForce GTX 675M compare 384 @ 0.62 GHz256 Bit @ 3000 MHz
GeForce GTX 670MX compare 960 @ 0.6 GHz192 Bit @ 2800 MHz
GeForce GTX 670M compare 336 @ 0.6 GHz192 Bit @ 3000 MHz
GeForce GTX 660M compare 384 @ 0.84 GHz128 Bit @ 4000 MHz
GeForce GTX 680M SLI compare 2688 @ 0.72 GHz2x 256 Bit @ 3600 MHz
GeForce GTX 680MX compare 1536 @ 0.72 GHz256 Bit @ 5000 MHz
GeForce GTX 675M SLI 768 @ 0.62 GHz256 Bit @ 3000 MHz
GeForce GTX 680M compare 1344 @ 0.72 GHz256 Bit @ 3600 MHz
GeForce GTX 670MX SLI 1920 @ 0.6 GHz2x 192 Bit @ 2800 MHz
GeForce GTX 675MX compare 960 @ 0.6 GHz256 Bit @ 3600 MHz
GeForce GTX 675M compare 384 @ 0.62 GHz256 Bit @ 3000 MHz
GeForce GTX 670MX compare 960 @ 0.6 GHz192 Bit @ 2800 MHz
GeForce GTX 670M compare 336 @ 0.6 GHz192 Bit @ 3000 MHz
GeForce GTX 660M compare 384 @ 0.84 GHz128 Bit @ 4000 MHz
CodenameN12E-GTX2N13E-GR
ArchitectureFermiKepler
Cores768 - unified1920 - unified
Core620 MHz600 MHz
Shader1240 MHz
Memory3000 MHz2800 MHz
Bus256 Bit2x 192 Bit
MemoryGDDR5GDDR5
Shared Memorynono
DirectXDirectX 11, 5.0DirectX 11, 5.1
Technology40 nm28 nm
FeaturesOptimus, SLI, PhysX, Verde Drivers, CUDA, 3D Vision, 3DTV PlayOptimus, SLI, PhysX, Verde Drivers, CUDA, 3D Vision, 3DTV Play
Size2/32/3
Introduced06.01.2011 01.10.2012
Manufacturerhttp://www.nvidia.com/object/geforce_gtx...http://www.geforce.com/hardware/notebook...
Transistors5080 Million

3DMark 11 - 3DM11 Performance Score
6389 Points (16%)
6459 Points (17%)
3DMark 11 - 3DM11 Performance GPU
6407 Points (11%)
7042 Points (12%)
3DMark Vantage
3DM Vant. Perf. total + NVIDIA GeForce GTX 675M SLI
3DM Vant. Perf. total + NVIDIA GeForce GTX 670MX SLI
3DM Vant. Perf. GPU no PhysX + NVIDIA GeForce GTX 675M SLI
3DM Vant. Perf. GPU no PhysX + NVIDIA GeForce GTX 670MX SLI
3DMark 03 - 3DMark 03 - Standard
78213 Points (41%)
3DMark 05 - 3DMark 05 - Standard
29851 Points (44%)
3DMark 06 3DMark 06 - Standard 1280x1024 + NVIDIA GeForce GTX 670MX SLI
Unigine Heaven 3.0 - Unigine Heaven 3.0 DX 11
66.1 fps (22%)
Unigine Heaven 2.1 - Heaven 2.1 high
87.2 fps (16%)
SPECviewperf 11
specvp11 snx-01 + NVIDIA GeForce GTX 670MX SLI
specvp11 tcvis-02 + NVIDIA GeForce GTX 670MX SLI
specvp11 sw-02 + NVIDIA GeForce GTX 670MX SLI
specvp11 proe-05 + NVIDIA GeForce GTX 670MX SLI
specvp11 maya-03 + NVIDIA GeForce GTX 670MX SLI
specvp11 lightwave-01 + NVIDIA GeForce GTX 670MX SLI
specvp11 ensight-04 + NVIDIA GeForce GTX 670MX SLI
specvp11 catia-03 + NVIDIA GeForce GTX 670MX SLI
Cinebench R11.5 Cinebench R11.5 OpenGL 64 Bit + NVIDIA GeForce GTX 670MX SLI

Average Benchmarks NVIDIA GeForce GTX 675M SLI → 100% n=4

Average Benchmarks NVIDIA GeForce GTX 670MX SLI → 119% n=4

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

Far Cry 3

Far Cry 3

2012
low 1024x768
GeForce GTX 670MX SLI:
107.7  fps
med. 1366x768
GeForce GTX 670MX SLI:
97.7  fps
high 1366x768
GeForce GTX 670MX SLI:
72.1  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
27  fps
med. 1366x768
GeForce GTX 670MX SLI:
57.7  fps
high 1366x768
GeForce GTX 670MX SLI:
55.7  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
31.2  fps
low 1024x768
GeForce GTX 670MX SLI:
67.6  fps
med. 1366x768
GeForce GTX 670MX SLI:
62.7  fps
high 1366x768
GeForce GTX 670MX SLI:
53.3  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
24.7  fps
low 1024x768
GeForce GTX 670MX SLI:
185.9  fps
med. 1366x768
GeForce GTX 670MX SLI:
171.7  fps
high 1366x768
GeForce GTX 670MX SLI:
124.4  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
85.7  fps
low 1024x768
GeForce GTX 670MX SLI:
59.6  fps
med. 1366x768
GeForce GTX 670MX SLI:
59.4  fps
high 1366x768
GeForce GTX 670MX SLI:
48.8  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
29  fps
low 1024x768
GeForce GTX 670MX SLI:
151.3  fps
med. 1366x768
GeForce GTX 670MX SLI:
128.9  fps
high 1366x768
GeForce GTX 670MX SLI:
113.2  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
47.2  fps
low 1024x768
GeForce GTX 670MX SLI:
129  fps
med. 1366x768
GeForce GTX 670MX SLI:
129.3  fps
high 1366x768
GeForce GTX 670MX SLI:
129.4  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
126.6  fps
low 1024x768
GeForce GTX 670MX SLI:
113.7  fps
med. 1366x768
GeForce GTX 670MX SLI:
43.8  fps
high 1366x768
GeForce GTX 670MX SLI:
51.9  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
33  fps
Fifa 13

Fifa 13

2012
low 1024x768
GeForce GTX 670MX SLI:
361.2  fps
med. 1366x768
GeForce GTX 670MX SLI:
331.6  fps
high 1366x768
GeForce GTX 670MX SLI:
315.4  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
207.2  fps
F1 2012

F1 2012

2012
low 1024x768
GeForce GTX 670MX SLI:
124  fps
med. 1366x768
GeForce GTX 670MX SLI:
102  fps
high 1366x768
GeForce GTX 670MX SLI:
98  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
79  fps
low 1024x768
GeForce GTX 670MX SLI:
117.8  fps
med. 1366x768
GeForce GTX 670MX SLI:
112.6  fps
high 1366x768
GeForce GTX 670MX SLI:
104.2  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
78.9  fps
low 1024x768
GeForce GTX 670MX SLI:
85.4  fps
high 1366x768
GeForce GTX 670MX SLI:
45.8  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
35.2  fps
low 1024x768
GeForce GTX 670MX SLI:
232.7  fps
med. 1366x768
GeForce GTX 670MX SLI:
220.8  fps
high 1366x768
GeForce GTX 670MX SLI:
208.2  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
168  fps
med. 1366x768
GeForce GTX 670MX SLI:
192.1  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
113  fps
low 1024x768
GeForce GTX 670MX SLI:
140.7  fps
med. 1366x768
GeForce GTX 670MX SLI:
102.9  fps
high 1366x768
GeForce GTX 670MX SLI:
84.6  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
26.7  fps
low 1024x768
GeForce GTX 670MX SLI:
76.5  fps
med. 1366x768
GeForce GTX 670MX SLI:
77.7  fps
high 1366x768
GeForce GTX 670MX SLI:
60.4  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
47.7  fps
low 1024x768
GeForce GTX 670MX SLI:
94.5  fps
med. 1366x768
GeForce GTX 670MX SLI:
77  fps
high 1366x768
GeForce GTX 670MX SLI:
74.6  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
31.4  fps
low 1024x768
GeForce GTX 670MX SLI:
340.8  fps
med. 1366x768
GeForce GTX 670MX SLI:
284.2  fps
high 1366x768
GeForce GTX 670MX SLI:
261.1  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
170.9  fps
low 1024x768
GeForce GTX 670MX SLI:
92.3  fps
med. 1366x768
GeForce GTX 670MX SLI:
99.6  fps
high 1366x768
GeForce GTX 670MX SLI:
77.9  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
46.1  fps
low 1280x720
GeForce GTX 670MX SLI:
60  fps
high 1366x768
GeForce GTX 670MX SLI:
59.9  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
59.9  fps
Alan Wake

Alan Wake

2012
low 1024x768
GeForce GTX 670MX SLI:
128.7  fps
med. 1366x768
GeForce GTX 670MX SLI:
88.5  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
45.9  fps
Anno 2070

Anno 2070

2011
low 1024x768
GeForce GTX 670MX SLI:
253.8  fps
med. 1366x768
GeForce GTX 670MX SLI:
160.4  fps
high 1366x768
GeForce GTX 670MX SLI:
106.4  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
50.8  fps
high 1366x768
GeForce GTX 670MX SLI:
88.3  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
63.4  fps
low 1024x768
GeForce GTX 670MX SLI:
260  fps
med. 1366x768
GeForce GTX 670MX SLI:
179  fps
high 1366x768
GeForce GTX 670MX SLI:
163.8  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
115  fps
low 1024x768
GeForce GTX 670MX SLI:
103.5  fps
med. 1366x768
GeForce GTX 670MX SLI:
90.6  fps
high 1366x768
GeForce GTX 670MX SLI:
81  fps
ultra 1920x1080
GeForce GTX 670MX SLI:
41.9  fps

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