 AMD Fellow Maurice Steinman has said the cores are almost transistor-for-transistor identical to those found in the 65 nm Turion 64 X2 processors .Turion II Ultra (codenamed "Caspian") is the mobile version of the K10.5 architecture produced using 45 nm fabrication process, also known by its desktop variant "Regor".It is a dual core processor, and features clock speeds of 2.5 GHz, 2 MB total L2 cache (1 MB per core), HyperTransport at 3.6 GT/s, and a 128 bit FPU.