It is likely that some overheating is occuring, causing this problem. The latest BIOS - version 0040 - included an adjustment to fan control settings, so if you do not have that one installed, please do so. It is available here: https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22638
Then check on the fan control setting:
- Press F2 to enter BIOS setup during POST.
- Go to the Cooling option.
- Set System Fan Control to Cool.
- Press F10 to save and exit BIOS.