As above but when I swap back to single channel mode , everything works fine
BTW my ram is 4x256 , so if i use single channel mode , I have to take out 2x256
any advice ?
An issue with the board and ram compatability with the bios could be the problem. Remove 2 sticks and run 512 in dual channel and see if it runs. If it doesn't swap the sticks over with the other 2 and try again. I'm thinking it will run fine in dual channel with 2 sticks but not 4.