What is your bios? , also I have a problem with GD65 but exactly VDROOP option does not properly:) is set to 1.365V in the BIOS is read from the DMM (idle: 1.35V / load: 1.38V)
vCore is overestimated CPU load: (I do not know how to prevent it, vdroop control does not work, whether low or high, all the time is the same.
all the time I am using a beta BIOS v1.8b6, performance oc the same as in v1.7b4