If you read the users rating and review of the RAM he tried 3 different kits which all failed mem tests and wreaked havoc in his system. Some of the tets were using 3D intensive games, but some of the crashes and memory failures were during normal use, like opening firefox. I would suggest you stay away from this particular RAM. Kingston is a reputable Company, but this particular "hyper" RAM has flaws. Buy regular Kingston or Crucial RAM.