NVIDIA GeForce GT 640: specs and benchmarks
NVIDIA started GeForce GT 640 sales 5 June 2012 at a recommended price of 99 USD. This is Kepler architecture desktop card based on 28 nm manufacturing process and primarily aimed at gamers. 2 GB of DDR3 memory clocked at 1.78 GHz are supplied, and together with 128 Bit memory interface this creates a bandwidth of 28.51 GB/s.
Compatibility-wise, this is 1-slot card attached via PCIe 3.0 x16 interface. Its manufacturer default version has a length of 145 mm. No additional power connector is required, and power consumption is at 65 Watt.
It provides poor gaming and benchmark performance at 6.51 percent of a leader's which is AMD Radeon R9 390 X2.