NVIDIA GeForce 840M: specs and benchmarks
NVIDIA started GeForce 840M sales 12 March 2014. This is Maxwell architecture notebook card based on 28 nm manufacturing process and primarily aimed at gamers. 4096 GB of DDR3 memory clocked at 2 GHz are supplied, and together with 64 Bit memory interface this creates a bandwidth of 16.02 GB/s.
Compatibility-wise, this is card attached via PCIe 3.0 x8 interface. Power consumption is at 33 Watt.
It provides poor gaming and benchmark performance at 6.67 percent of a leader's which is AMD Radeon R9 390 X2.