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Nvidia Preps OEM GeForce GT 630, GT 645 & Three GT 640s

Nvidia has released five new GeForce cards under the 600 series, which are designated for OEMs only. There still is no official word from Nvidia on when the Kepler-based GK107 cards are expected for the desktop (though we should expect them here in the near future).

The top card, the GeForce GT 645, is a re-branding of the recently released Fermi-based GF114 GeForce GTX 560 SE. The other Fermi-based card is one of three GeForce GT 640 cards. It is based on the Fermi GF116, which features 144 CUDA cores, 1.5 GB or 3 GB GDDR3 192-bit memory interface, 720 MHz core clock speed, and 891 MHz memory clock speed.

There are three Kepler-based GK107 graphics cards, which all feature 384 CUDA cores, 24 TMUs and 16 ROPs. The two GeForce GT 640s differ in core clocks, memory, and TDP. At the high-end, the GT 640 has a core clock speed of 950 MHz, with the low-end running at 797 MHz. The memory clocks come in at 2500 MHz (GDDR5) and 891 MHz (GDDR3) respectively. The cards offer TDP of 75 W and 50 W.

One of the more interesting cards of the bunch is the GeForce GT 630. It is a single-slot, low-profile graphics card with 384 CUDA cores, 128-bit wide GDDR3 memory interface, 875 MHz GPU clock speed, 891 MHz memory clock speed and TDP of 50 W. When compared against the low-end GT 640, the GT 630 is actually the better card and in-turn will offer users better performance in their OEM system.  


GeForce GT 630GeForce GT 640GeForce GT 640GeForce GT 640GeForce GT 645
ArchitectureKepler GK107Kepler GK107Fermi GF116Kepler GK107Fermi GF114
CUDA Cores:384384144384288
Core Clock:875 MHz797 MHz720 MHz950 MHz776 MHz
Shaders Clock:875 MHz797 MHz1440 MHz950 MHz1552 MHz
Memory Clock:891 MHz891 MHz891 MHz2500 MHz1914 MHz
Memory Type:1 or 2GB GDDR3 128-bit1 or 2GB GDDR3 128-bit1.5 or 3GB GDDR3 192-bit1 or 2GB GDDR5 128-bit1GB GDDR5 128-bit
Memory Bandwidth28.5 GB/s28.4 GB/s43 GB/s80 GB/s91.9 GB/s
Open GL:
TDP:50 W50 W75 W75 W140 W
GeForce GT 630GeForce GT 640GeForce GT 645
Image Credit: VideoCardz