NVIDIA GeForce GT 640 Rev. 2: specs and benchmarks
NVIDIA started GeForce GT 640 Rev. 2 sales 29 May 2013 at a recommended price of $89 . This is Kepler 2.0 architecture desktop card based on 28 nm manufacturing process and primarily aimed at office use. 1 GB of GDDR5 memory clocked at 5.01 GHz are supplied, and together with 64 Bit memory interface this creates a bandwidth of 40.06 GB/s.
Compatibility-wise, this is 1-slot card attached via PCIe 2.0 x8 interface. Its manufacturer default version has a length of 145 mm. No additional power connector is required, and power consumption is at 49 Watt.
It provides poor gaming and benchmark performance at 3.33 percent of a leader's which is AMD Radeon R9 390 X2.