IBM 3837-AC1 X3850 X6 ServerHdd/raid module (no drives or raid controller)4 x compute modules (fans and heatsink) *No processors and memory*2 x half width rear i/o modules (some open slots possible)1 x full width rear i/o module (some open slots possible)4 x power suppliesRail kit (no cable management arm)Both front left/right plastic bezels.