Re: P67 Extreme4 Gen3 with Ivy Brige CPU, 55 Dr. Debug code
I got the 55 error code when setting the xmp profile for my 2133MHz memory. It seems my memory is set to 1.25v. Try clearing cmos and removing the motherboard battery. You should unplug you power supply power as well, and short out the contacts under the battery.
Give it 5 minutes or so and try again. Go to BIOS immediately and load system defaults, then set dram volts to 1.55.
ASRock Z68 Extreme3 Gen3 i7 2600K 8GB (2 x 4GB) G.Skill 1333 CL9 MSI HD 7750 Corsair TX850 80Plus
GigaByte A75-UD4H AMD A*-3870K 8GB (2X4GB) G.Skill 1866 CL8 On-Chip 6550D Antec EA-450 80Plus Platinum