Asus P6T-DV2 12G RAM Windows 7X64 Have had this configuration for nearly three years and it has run fine. Then recently BSODs started. I had not knowingly made any changes. System either freezes or the monitors go black. Windows says hardware 124 error but am not convinced. I have done this so far without any ability to see effects: 1) Fresh reload of Win 7 x64 Ultimate 2) Three different video cards (2 new) all tried in different slots 3) New memory 4) New motherboard (same model) 5) Ran CPU tester and came out OK I have tried to update video card drivers and when either the AMD or NVIDIA driver packages (depending on which card I have inserted) try to install I get a freeze and have to reboot. I've spent a fair amount of time on this and would appreciate any help I can get. The attached .ZIP file provides all the info requested.