I've just installed 4*1gb sticks of corsair 55512 ram in my gigabyte DS3. Now the chip is at 2.8ghz with 400*7. Now my old 4*512 sticks of Geil 6400 44412 passed memtest. I'm getting 1 error on test 7 each time. I don't know whether i should be bothered about this or not. Maybe it's my memory controller? I haven't done a full test yet, but we'll see.