I have Vista Home Premium 64 bit OS, Intel DX38BT MoBo, Bios version 1521, which is the latest, All of the MS updates have been done. In the Bios it shows 4x1024 sticks but in the control panel>system it shows 3066MB. I have tried rebooting F2 bios, F9-F 10 then I have to reconfigure it for my Sata Raid 0 and then reboot and here we are with 3066 mb of ram when the bios shows 4 sticks of 1333Mhz. I have run the sticks around to make sure that one isn't faulty, no luck. Is this a software fault with 64?