NVIDIA GeForce GTX 675M SLI

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.

ManufacturerNVIDIA
GeForce GTX 600M Series

GeForce GTX 680M SLI

2688 @ 720MHz256 Bit @ 3600MHz

GeForce GTX 680MX

1536 @ 720MHz256 Bit @ 5000MHz
GeForce GTX 675M SLI 768 @ 620MHz256 Bit @ 3000MHz

GeForce GTX 680M

1344 @ 720MHz256 Bit @ 3600MHz

GeForce GTX 670MX SLI

1920 @ 600MHz192 Bit @ 2800MHz

GeForce GTX 675MX

960 @ 600MHz256 Bit @ 3600MHz

GeForce GTX 675M

384 @ 620MHz256 Bit @ 3000MHz

GeForce GTX 670MX

960 @ 600MHz192 Bit @ 2800MHz

GeForce GTX 670M

336 @ 598MHz192 Bit @ 3000MHz

GeForce GTX 660M

384 @ 835MHz128 Bit @ 4000MHz
CodenameN12E-GTX2
ArchitectureFermi
Pipelines768 - unified
Core Speed *620 MHz
Shader Speed *1240 MHz
Memory Speed *3000 MHz
Memory Bus Width256 Bit
Memory TypeGDDR5
Shared Memoryno
DirectXDirectX 11, Shader 5.0
Power Consumption2x 100 Watt
technology40 nm
FeaturesOptimus, SLI, PhysX, Verde Drivers, CUDA, 3D Vision, 3DTV Play
Notebook Sizelarge
Date of Announcement06.01.2011
Link to Manufacturer Pagehttp://www.nvidia.com/object/geforce_gtx...
* The specified clock rates are only guidelines for the manufacturer and can be altered by them.

Benchmarks

3DMark 11 - Performance GPU 1280x720
0% 100%
min: 6407      avg: 6407 (40%)     median: 6407 (40%)     max: 6407 points
3DMark 11 - Performance 1280x720
0% 100%
min: 6389      avg: 6389 (49%)     median: 6389 (49%)     max: 6389 points
3DMark Vantage - P GPU no PhysX 1280x1024
0% 100%
min: 17631      avg: 17631 (38%)     median: 17631 (38%)     max: 17631 Points
3DMark Vantage - P Result no PhysX 1280x1024
0% 100%
min: 18405      avg: 18405 (47%)     median: 18405 (47%)     max: 18405 Points
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card

For more games that might be playable and a list of all games and graphics cards visit our Gaming List

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Class 1
GeForce GTX 590
GeForce GTX 760
GeForce GTX 580
Radeon HD 6970
GeForce GTX 750 Ti
GeForce GTX 570
GeForce GTX 560 Ti
Radeon HD 5850
Radeon HD 7770
Radeon HD 7770
GeForce GTX 460 768MB
Radeon HD 6790
Radeon HD 5770
GeForce GTX 550 Ti
Class 2
GeForce GTS 450
Radeon HD 4850
Class 3
Radeon HD 5670
GeForce GT 240
GeForce GT 430
Radeon HD 5570
GeForce GT 220
Radeon HD 6450 GDDR5
Class 4
Radeon R3 (Mullins/Beema)
Class 5
Radeon HD 4350
GeForce G 107M *
Chrome9HD *
Class 6
unknown *

* Approximate position of the graphics adapter

> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Comparison of Laptop Graphics Cards > NVIDIA GeForce GTX 675M SLI
Author: Klaus Hinum (Update: 2013-01-17)