Please run memtest on your ram I'm getting DFEEDF19 errors on all my ram 4 sticks and have read this may be a Gigabyte problem here a link about it. Please try it and see, check out this link. http://www.houseofhelp.com/forums/showthread.php?p=321603#post321603 I'm trying to see if my memory is bad or if it's a problem with mem test. It is hard to believe all 4 sticks would go bad. okay I found the problem if you use bios F9 it causes memory errors I went back to F8 and it's fixed.