Try this BIOS
Please use Qflash, DO NOT USE @BIOS, here is a guide
BIOS Flashing - A "How To ~ Qflash Guide"
There is MANY things that can cause this, it's best to start with the latest BIOS to rule that out. After that, or before if you want, please disable C1E and EIST in your BIOS and see if that helps.
Also, if installed, uninstall Gigabyte DES (Dynamic Energy Saver) and Easytune and see if either of those help. If that does not, and the new BIOS does not then it would be some part of your hardware or drivers as this has been corrected in the current BIOSes.