NVIDIA GeForce GT 650M SLI vs NVIDIA GeForce GT 625M

NVIDIA GeForce GT 650M SLI

► remove NVIDIA GeForce GT 650M SLI

The NVIDIA GeForce GT 650M SLI is a high-end DirectX 11-compatible graphics solution for laptops, consisting of two GeForce GT 650M. Each card has a 28nm GK107 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 650M SLI is currently used only in the Lenovo Y500 with fast GDDR5 graphics memory and clock rates of 790 to 835 MHz (GeForce Boost).

Architecture

The Kepler architecture is the successor to the Fermi architecture that first appeared in laptops with the GeForce 400M series. The GK107 Kepler core offers two shader blocks, called SMX, each with 192 shaders for a total of 384 shader cores that are clocked at the same speed as the central core. 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 about as fast as 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 gaming performance of the SLI combination ranges between a GeForce GTX 670MX (maximum, e.g. in 3DMark 11 benchmarks) down to a single GeForce GT 650M (if SLI is not supported by the game). On average the 650M SLI could therefore be placed a bit above a Geforce GTX 660M in the high-end class. Modern games of 2012 should therefore be playable with high 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 GK107 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.

The power consumption of the GeForce GT 650M SLI should double compared to a single GTX 650M. Therefore, only large laptops can handle the heat dissipation.

NVIDIA GeForce GT 625M

► remove NVIDIA GeForce GT 625M

The NVIDIA GeForce GT 625M is an entry-level, DirectX 11 compatible graphics card that was announced in the third quarter of 2012 for laptops. Compared to the older GeForce GT 620M, it is a higher clocked version of the chip. The 620M can be based on either the 40nm GF108 chip (similar to the GeForce GT 525M) or the new power-optimized 28nm GF117 chip with 64-bit or 128-bit DDR3 memory. Both architectures still stem directly from the Fermi generation. Therefore, both versions are also possible for the GT 625M.

It should be noted that the 28nm version of the GT 620M does not offer dedicated graphics ports and can therefore only be used in conjunction with Optimus. 

Architecture

The GF117 is based on the optimized GF108 Fermi chip (GeForce GT 540M) and offers 96 shaders, 16 TMUs and 4 ROPs. Each shader core is clocked twice as fast as the rest of the graphics chip, a technique known as hot clocking. More detailed information on Fermi can be found on the GT 435M GPU page.

Performance

The performance of the GT 625M depends on the Turbo clock in the used laptop but should be on average a bit above the average GT 620M. Therefore, the card is suited for casual gamers as demanding games of 2012 may only run in low detail settings fluently.

Features

The shader cores (also called CUDA cores) can be used for general calculations with APIs such as CUDA, DirectCompute 2.1 and OpenCL. PhysX is theoretically possible, but the GT 625M is too slow to handle both PhysX and 3D rendering for modern games. 3D Vision is not supported according to Nvidia.

NVIDIA GeForce GT 650M SLINVIDIA GeForce GT 625M
ManufacturerNVIDIANVIDIA
GeForce GT 600M Series
GeForce GT 650M SLI 768 @ 790 - 835 (Boost) MHz2x 128 Bit @ 4000 MHz
GeForce GT 650M (compare) 384 @ 735 - 900 (Boost) MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 645M (compare) 384 @ 710 MHz128 Bit @ 1800 MHz
GeForce GT 640M (compare) 384 @ 625 - 645 (Boost) MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 640M LE (compare) 384 @ 500 MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 635M (compare) 144 @ 660 - 753 (Boost) MHz128/192 Bit @ 1800 MHz
GeForce GT 630M (compare) 96 @ 672 MHz128 Bit @ 1800 MHz
GeForce GT 625M 96 @ 625 MHz64 Bit @ 1800 MHz
GeForce GT 620M (compare) 96 @ 625 - 715 (Boost) MHz64 / 128 Bit @ 1800 MHz
GeForce GT 650M SLI 768 @ 790 - 835 (Boost) MHz2x 128 Bit @ 4000 MHz
GeForce GT 650M (compare) 384 @ 735 - 900 (Boost) MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 645M (compare) 384 @ 710 MHz128 Bit @ 1800 MHz
GeForce GT 640M (compare) 384 @ 625 - 645 (Boost) MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 640M LE (compare) 384 @ 500 MHz128 Bit @ 1800 - 4000 MHz
GeForce GT 635M (compare) 144 @ 660 - 753 (Boost) MHz128/192 Bit @ 1800 MHz
GeForce GT 630M (compare) 96 @ 672 MHz128 Bit @ 1800 MHz
GeForce GT 625M 96 @ 625 MHz64 Bit @ 1800 MHz
GeForce GT 620M (compare) 96 @ 625 - 715 (Boost) MHz64 / 128 Bit @ 1800 MHz
CodenameN13E-GEN13M-GS
ArchitectureKeplerFermi
768 - 96 -
Core790 - 835 (Boost) MHz625 MHz
Memory4000 MHz1800 MHz
Bus2x 128 Bit64 Bit
MemoryGDDR5DDR3
Max. Memory2x2048 MB1024 MB
nono
DirectXDirectX 11, 5.0DirectX 11, 5.0
Technology28 nm28 nm
FeaturesOptimus, PhysX, Verde Drivers, CUDA, 3D Vision, 3DTV PlayPhysX, Verde Drivers, CUDA, Play, Optimus
Size
Introduced22.03.2012 01.10.2012
Manufacturerhttp://www.geforce.com/hardware/notebook...

3DMark 11 - Performance 1280x720
min: 3341     avg: 3546     median: 3621 (10%)     max: 3676 points
1037 points (3%)
3DMark 11 - Performance GPU 1280x720
min: 3533     avg: 3580.7     median: 3597 (7%)     max: 3612 points
921 points (2%)
3DMark Vantage
P Result 1280x1024 + NVIDIA GeForce GT 650M SLI
P GPU no PhysX 1280x1024 + NVIDIA GeForce GT 650M SLI
3DMark 03 - Standard 1024x768
57023 Points (30%)
3DMark 05 - Standard 1024x768
24750 Points (47%)
3DMark 06 Standard 1280x1024 + NVIDIA GeForce GT 650M SLI
Unigine Heaven 3.0 - DX 11, Normal Tessellation, High Shaders 1920x1080
35.8 fps (13%)
Unigine Heaven 2.1 - high, Tesselation (normal), DirectX11 1280x1024
47.6 fps (21%)
SPECviewperf 11
Siemens NX 1920x1080 + NVIDIA GeForce GT 650M SLI
Tcvis 1920x1080 + NVIDIA GeForce GT 650M SLI
SolidWorks 1920x1080 + NVIDIA GeForce GT 650M SLI
Pro/ENGINEER 1920x1080 + NVIDIA GeForce GT 650M SLI
Maya 1920x1080 + NVIDIA GeForce GT 650M SLI
Lightwave 1920x1080 + NVIDIA GeForce GT 650M SLI
Ensight 1920x1080 + NVIDIA GeForce GT 650M SLI
Catia 1920x1080 + NVIDIA GeForce GT 650M SLI
Cinebench R10 Shading 32Bit + NVIDIA GeForce GT 650M SLI
Cinebench R11.5 OpenGL 64Bit + NVIDIA GeForce GT 650M SLI

Average Benchmarks NVIDIA GeForce GT 650M SLI → 100%

Average Benchmarks NVIDIA GeForce GT 625M → 27%

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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
100%
GeForce GT 650M SLI:
105.7  fps
med. 1366x768
100%
GeForce GT 650M SLI:
88.8  fps
high 1366x768
100%
GeForce GT 650M SLI:
42.6  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
15.6  fps
GeForce GT 650M SLI:
»
med. 1366x768
100%
GeForce GT 650M SLI:
63  fps
high 1366x768
100%
GeForce GT 650M SLI:
59.9  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
22.2  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
68.4  fps
med. 1366x768
100%
GeForce GT 650M SLI:
59.7  fps
high 1366x768
100%
GeForce GT 650M SLI:
35.8  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
19.1  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
147.7  fps
med. 1366x768
100%
GeForce GT 650M SLI:
121.3  fps
high 1366x768
100%
GeForce GT 650M SLI:
81.8  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
55.3  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
59.9  fps
med. 1366x768
100%
GeForce GT 650M SLI:
49.6  fps
high 1366x768
100%
GeForce GT 650M SLI:
29.9  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
17.4  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
118.9  fps
med. 1366x768
100%
GeForce GT 650M SLI:
86.6  fps
high 1366x768
100%
GeForce GT 650M SLI:
71.3  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
31.2  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
128.5  fps
med. 1366x768
100%
GeForce GT 650M SLI:
128  fps
high 1366x768
100%
GeForce GT 650M SLI:
123.3  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
95.8  fps
GeForce GT 650M SLI:
»
Fifa 13

Fifa 13

2012
low 1024x768
100%
GeForce GT 650M SLI:
274.2  fps
med. 1366x768
100%
GeForce GT 650M SLI:
225.1  fps
high 1366x768
100%
GeForce GT 650M SLI:
208.4  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
194.4  fps
GeForce GT 650M SLI:
»
F1 2012

F1 2012

2012
low 1024x768
100%
GeForce GT 650M SLI:
140  fps
med. 1366x768
100%
GeForce GT 650M SLI:
114  fps
high 1366x768
100%
GeForce GT 650M SLI:
109  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
53  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
89.9  fps
med. 1366x768
100%
GeForce GT 650M SLI:
79.6  fps
high 1366x768
100%
GeForce GT 650M SLI:
78.2  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
59.9  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
92  fps
high 1366x768
100%
GeForce GT 650M SLI:
47.1  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
23.2  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
246.9  fps
med. 1366x768
100%
GeForce GT 650M SLI:
218.7  fps
high 1366x768
100%
GeForce GT 650M SLI:
199.7  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
138.7  fps
GeForce GT 650M SLI:
»
med. 1366x768
100%
GeForce GT 650M SLI:
116.9  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
69.8  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
135.9  fps
med. 1366x768
100%
GeForce GT 650M SLI:
97.7  fps
high 1366x768
100%
GeForce GT 650M SLI:
52.5  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
13.6  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
74.8  fps
med. 1366x768
100%
GeForce GT 650M SLI:
71.6  fps
high 1366x768
100%
GeForce GT 650M SLI:
33.1  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
26.1  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
104.7  fps
med. 1366x768
100%
GeForce GT 650M SLI:
64.5 83.6 ~ 74 fps
high 1366x768
100%
GeForce GT 650M SLI:
49.7 53 ~ 51 fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
19.2 19.2 ~ 19 fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
241.4  fps
med. 1366x768
100%
GeForce GT 650M SLI:
197  fps
high 1366x768
100%
GeForce GT 650M SLI:
178.4  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
106.7  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
95.7  fps
med. 1366x768
100%
GeForce GT 650M SLI:
76.7  fps
high 1366x768
100%
GeForce GT 650M SLI:
61.2  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
29.8  fps
GeForce GT 650M SLI:
»
low 1280x720
100%
GeForce GT 650M SLI:
59.9  fps
high 1366x768
100%
GeForce GT 650M SLI:
59.9  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
59.8  fps
GeForce GT 650M SLI:
»
Alan Wake

Alan Wake

2012
low 1024x768
100%
GeForce GT 650M SLI:
100.4  fps
med. 1366x768
100%
GeForce GT 650M SLI:
63.6  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
30.8  fps
GeForce GT 650M SLI:
»
Anno 2070

Anno 2070

2011
low 1024x768
100%
GeForce GT 650M SLI:
147.5  fps
med. 1366x768
100%
GeForce GT 650M SLI:
78.9  fps
high 1366x768
100%
GeForce GT 650M SLI:
54.1 56.8 ~ 55 fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
30.5 32.3 ~ 31 fps
GeForce GT 650M SLI:
»
med. 1366x768
100%
GeForce GT 650M SLI:
90.4  fps
high 1366x768
100%
GeForce GT 650M SLI:
73.4  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
45.4  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
176.5  fps
med. 1366x768
100%
GeForce GT 650M SLI:
152.3  fps
high 1366x768
100%
GeForce GT 650M SLI:
124.1  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
73.6  fps
GeForce GT 650M SLI:
»
low 1024x768
100%
GeForce GT 650M SLI:
92.3  fps
med. 1366x768
100%
GeForce GT 650M SLI:
71  fps
high 1366x768
100%
GeForce GT 650M SLI:
55  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
26.8  fps
GeForce GT 650M SLI:
»
high 1366x768
100%
GeForce GT 650M SLI:
43.1  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
23.8  fps
GeForce GT 650M SLI:
»
Mafia 2

Mafia 2

2010
high 1360x768
100%
GeForce GT 650M SLI:
74.5  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
58.2  fps
GeForce GT 650M SLI:
»
high 1600x900
100%
GeForce GT 650M SLI:
79.1  fps
ultra 1920x1080
100%
GeForce GT 650M SLI:
19.9  fps
GeForce GT 650M SLI:
»

Average Gaming NVIDIA GeForce GT 650M SLI → 100%

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