NVIDIA GeForce GT 640M Mac Edition technical specs and benchmarks
NVIDIA started GeForce GT 640M Mac Edition sales 3 February 2013. This is a Kepler architecture desktop card based on 28 nm manufacturing process and primarily aimed at office use. 0.5 GB of GDDR5 memory clocked at 5 GHz are supplied, and together with 64 Bit memory interface this creates a bandwidth of 40 GB/s.
Compatibility-wise, this is card attached via PCIe 3.0 x16 interface. Its power consumption is at 32 Watt.
It provides poor gaming and benchmark performance at 0.97 percent of a leader's which is AMD Radeon R9 390 X2.