OS: Windows Server 2008 R2 Datacenter with SP1 All latest patches installed as of 4/12/2011 HW: HP DL980 G7 Ram: 2TB (128 x 16Gb) CPU: 8 - 8 Core Xeon x7560 2.27GHz Storage: (Proof of Concept server, don't worry about raid level) C_Drive: 2 - 146Gb 15k Sas (Raid 0) D_Drive: DVD-Rom E_Drive: 5 - 300Gb 10k Sas (Raid 0) Bios: HP P66 (7/27/2010) Problem: System shows 2TB (0.98TB Usable). Nothing I've found tells me how to enable the other TB of Ram, any suggestions? System Properties: <IMG height=304 alt=08 src="http://67.214.224.138/ramissue/systeminfo.jpg" width=573> MSInfo32: <IMG height=648 alt=08 src="http://67.214.224.138/ramissue/msinfo32.jpg" width=728> Task Manager: <IMG height=712 alt=08 src="http://67.214.224.138/ramissue/taskman.jpg" width=468> --RG