I overclocked my e6600 to 3.2(8*400) with a ds3 motherboard with f10 bios, the multi is at 2.5 so my ram is at 1000 its rated speed my timings were manually set to 4-4-4-15 its default i then ran memtest for 11 hours it said 36 passes with no errors then a few days later my computer randomly crashes i then run memtest once again now it fails within a few min of it running. This ram has already been rma'd is this a motherboard failure or a ram failure? Should i return the ram for something else or should i stick with this failure ram? Can someone please help.