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Wednesday, April 25, 2012
NVIDIA Releases The GT 645, GT 640, GT 630 GPUs To OEMs

NVIDIA has released five new OEM graphics cards for the desktop market, based on both 28nm Kepler and 40nm Fermi GPUs.

The GT 645 is based on Fermi GF114 core and has 288 CUDA cores paired with a 192-bit memory bus and a core clock running at 776MHz.

The GT 640 comes in three vesions: A full GK107 (384 cores) GT640 (GDDR5 memory 950MHz clock), a GF116 (144 cores) GT 640 version with DDR3 memory and a 720MHz clock speed, and a GT 640 that’s a full GK107 (384 cores) with DDR3 memory and a 797Mhz clock speed.

The final card is the GK107-based GT 630. This is also a full GK107 (384 cores), paired with DDR3 memory and a clockspeed of 875MHz.

  GT 645 GT 640 GT 640 GT 640 GT 630
Stream Processors 288 384 144 384 384
Texture Units 48 32 24 32 32
ROPs 24 16 16 16 16
Core Clock 776MHz 950MHz 720MHz 797MHz 875MHz
Shader Clock 1552MHz 950MHz 1440MHz 797MHz 875MHz
Memory Clock 3.828GHz GDDR5 5GHz GDDR5 1.782GHz DDR3 1.782GHz DDR3 1.782GHz DDR3
Memory Bus Width 192-bit 128-bit 192-bit 128-bit 128-bit
Frame Buffer 1GB 1GB/2GB 1.5GB/3GB 1GB/2GB 1GB/2GB
GPU model GF114 GK107 GF116 GK107 GK107
TDP 140W 75W 75W 50W 50W
Manufacturing Process TSMC 40nm TSMC 28nm TSMC 40nm TSMC 28nm TSMC 28nm

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