http://hwbot.org/forum/showthread.php?t=15952
Seems to fix the multiplier wall for people of 44-48x or so random, leaving you to OC to the chip's limit.
Boards with updated BIOS in the link:
GIGABYTE
- P67A-UD4 (F6x)
- P67A-UD5 (F5x)
- P67A-UD7 (F6x)
ASUS
- P8P67 Deluxe (1053)
- P8P67 Pro (1053)
- Maximus IV Extreme (0653)
INTEL
- DP67BG (1780)

