The board is very finicky when it comes to overclocking. As of right now i dont OC on this board anymore.
When you manipulate CPU PLL in any fashion and attempt to save the settings in BIOS the board will go into a session of rolling reboots , sometimes 6 reboots before a post screen or before you can get back into BIOS where finally CPU PLL will be saved to your desired manipulation.
The dual BIOS is VERY problematic if you do not flash to the same BIOS as your main BIOS, when overclocking you will almost always end up with a BIOS checksum error where the bios will flash automatically to the back up BIOS F3.
Now those 2 problems are avoidable and easily dealt with , although, still the BIOS has problems keeping settings saved , if you use easytune6 even if you have real time bios change enabled on random occasions you will be prompted to restart your machine for an OC to take effect when it should not need so, even when you go into the BIOS it will even show enabled but you have to toggle it in order for the real time BIOS change to take effect on your next session in windows.
Also when it comes to OCing, voltages and multipliers that are seemingly stable in prime and other bench programs, im talking 8 hour + tested OCs you will randomly sometimes get an error saying errors have occurred due to voltage changes and the BIOS will revert your settings back to stock, this is very problematic in the sense that sometimes CPU PLL will be reverted back to default and for higher OCs you need this enabled , and BAM, you are back to the rolling reboots ....
I want to stress this is in my experience with the p67 UD7, i have talked to many people here on OCn and they too have had almost the exact same problems with the board that i have, my board is NOT broken according to many people on this site and according to gigabyte, these are just some of the quirks the board has, will the new B3 boards solve the problem? I am not sure , hopefully the BIOS versions will become more stable and these problems will not occur.
All in all this was my first gigabyte board and in conclusion i will not purchase another gigabyte board in the future, OCing itself is already a time consuming process where patients is a virtue, but these are problems that should not add to the already large time sink that is OCing, at first i was dealing with them thinking new BIOS would help , but i have tried every single beta BIOS and the problems are still apparent in every version.
I will be getting a refund from Newegg.com and paying the difference on the ASUS Maximus 4 Extreme as soon as i am able.
Dont get me wrong apparently there are people who have for some reason or another sailed through using the UD5 and UD7 without ever encountering any of these problems, but if the board is not broken, then these people must be lying or are just VERY lucky... who knows...