I believe Guacamole was the one having the vcore issues, but i have a rebooting issue when using 200 base clock. Pretty much what happens is, if i shut my system off, 19x200 3.8ghz fully stable, never crashes, never hangs, but if i completely shut the system down, and start up again, i get the two boots, remember back in the days of the ASUS 965 Deluxe board.
I have the same and exact behaivor with my I7 setup. It's not a big issue.
Windows 7 Ultimate 64bit, SP1 Power By:
Asus Rampage IV Formula
Intel SBE 3930K
Gskill RipJaws Z 14900 (1866 DDR3) 16GB 10-11-10-24
EVGA 570 GTX SLI
SSD Samsung P830 240GB
Corsair AX850
Bookmarks