If you are on the GBT board then Please download the F3a BIOS:
LINK

This should fix any HT ref. clock adjustment related hangs with Phenom.

MSI should be pretty stable if you clock in small steps (4MHz HT ref. clock or less at a time). CPU multipliers and voltage slider should be OK.

ASUS is fine if you have Nov 15 or later BIOS.

if you are seeing issue please post Board model and BIOS version (and AOD version too).

This one is the recommended version at this time.

New AOD should be out next week (with tons of fixes vs current version).