The Intel Atom Z3745 is a mobile chip built on the 22nm Silvermont microarchitecture and was released during the 2nd quarter of 2014.
It features 4 physical cores initially clocked at 1.33 GHz, which may go up to 1.86 GHz in Turbo mode. It has an L1 and L2 cache of 224 Kb and 2048 Kb respectively, and does not have an L3 cache.
It integrates the Intel HD Graphics (Bay Trail) GPU and so is only capable of running very non-demanding games. It does however have an extremely low TDP of just 2W.