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) R_Drive: 512Gb Ram drive (hence the need for all the Ram) 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: http://67.214.224.138/ramissue/systeminfo.jpg MSInfo32: http://67.214.224.138/ramissue/msinfo32.jpg Task Manager: http://67.214.224.138/ramissue/taskman.jpg

Hi, Windows Server 2008 R2 Datacenter can use 2 TB RAM totally, if the hardware can also support. Based on the current situation, please try to install the hotfix the following Microsoft KB article provides: Windows Server 2008 R2 cannot be installed or started on a computer that has 1 TB or more of RAM http://support.microsoft.com/kb/980598 If it does not work, please also update the BIOS and the chipset drivers. If the issue persists, please contact your vendor, HP to check if the hardware devices can support 2 TB RAM. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, I would like to confirm what is the current situation? If there is anything that I can do for you, please do not hesitate to let me know, and I will be happy to help. Regards, Arthur Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com .Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.