I have an MSI h81m-p33. I can't get it to boot at 4.2ghz, even at 1.4v. I'm stress testing it at 4.1@1.33v, anything under 1.33 is instant whea error. Did I get the worst chip ever? I built my family member a PC with one aswell, but hers runs at stock. I could drive out there and swap them but it would be a while before I could swap back if it was worse. Can it only go uphill from this shitty chip?