homebuilt, sabertooth x79, i7-3930, 16gb corsair memory gtx 670 geforce graphics, asus bc-12b1st cdrom/dvd. System looks great in BIOS (flashed and up-to-date). System begins boot from Windows 8 installation CD, and then crashes after loading for a minute or two. Tried to load an older version of Vista and got the same result. I have run through all the basic checklists (worked through other memory related issue posts) to no avail. I have a last guess...what is yours?