An apparent power supply incompatibility affecting the Gigabyte GA-Z77X-UP5 TH motherboard. This may be due to bugs in the firmware in regards to the new IR Digital Power Controller/IR3550 PowIRstage ICs. If you're having this issue, please comment and contact Gigabyte at http://www.gigabyte.us/support-downloads/technical-support.aspx to have them acknowledge this!