From RAJA on the ROG forums (original post Crosshair VI Hero: UEFI build 1401 - Page 53 ):
"Direct from Elmor:
AGESA 1006 RC4 official BIOS 1401
Just tested quickly 3600 memory and cold booting, seems good but you guys are going to have to help me test this before we have a judgement. Seems CPU temp reading from SIO now has -20*C offset for XFR enabled CPUs."
Just leaving this here so you don't have to hunt it down buried in forums. It's not posted yet on their site.