OK, I bought a new kit. I pulled the MB (xfx nvidea 740a , OCZ SLI Ready 4GB 2x2GB DDR2 800MHz PC2 6400 , and phenom 9500. I had no problem installing the new Z87-pro with I7-4770 with a sapphire 7770, it is up and running first try. The old kit was installed into moms tower/psu There is no Video card, and NO other cards installed at this time. Despite making no changes (other than I took out the 7770), I did receive a bios checksum fail (once) Now I have been unable to install Windows 7 Home premium x64 During installation. I was receiving PFN_LIST_CORRUPT 0x0000004E (0x0000000000000099) I pulled out the ram, reseated one of the 2 (closest to cpu) and ran memtest no errors found. I reloaded the windows 7 setup in safe mode. and the install goes further, and I get PAGE_FAULT_IN-NON-PAGE_AREA stop: 0x00000050 (0xFFFFF6FC007F8000, 0X0000000000000000, 0xFFFFF8000C4D9D27.0 Still no OS, I have a friend trying to bootstrap sata drivers to an install disk, thinks that the 3rd party drivers are causing the problem. I was sure it was ram, I have ran memtest86+-5.01. on the 1 stick of ram, and have seen no errors. I have not tested the other one, but I receive the same error with either and or both. I suspect a conflict with the (xfx nvidea 740a) settings. my next step will be to install the 7770 and see if it works with a video card, and the on board video disabled. I am not holding my breath.