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