2l82Edit ,, it was just that i used Bios not uefi . trying to Instål again and Lets see what the **** happens (this time using LCC instd. off direct usb instal) Edit. 3. It Worked now. I did not install windows from Lcc , that was the problem . ty for very nice and help 
Hello,  I have a Dell ist H3ll Power-Edge R520 that I want to squeeze Windows Server 2008 on. As it has 44G.B. of Ram, and standard edition of Windows only takes 32, I went for "DataCentre Edition" supporting up to 2TB of RAM. But after first restart during install, it instantly threw a BSOD and restarted. It wouldn't even start at all in UEFI boot mode, except if picking the device (P.E.R.C. Controller) manually. In BIOS mode it succeds to boot automaticaly, but still threws BSOD and restarts. The Mode is set to AHCI boot, should i use ATA or RAID instead or what could Problem be? Thank you buddies,  ///Ahrlœ  
R520 Power-Edge BSOD on boot during Windows Server 2008 R2 Installazione