Asrock P67 Extreme4 UEFI & Drivers thread [Extreme6 & Pro3 owners welcome]

[GripS]

So I shut down, turn off electricity, remove battery for a while, reset jumper to clear, replace battery, power on, power off, reset jumper to save, power on?

Power off.
Disconnect power chord.
Move jumper to clear position (or press CMOS clear button on back of PC).
Move jumper back to original position.
Plug in power.
Power on and enter UEFI. Load Optimized defaults. Reboot
Enter UEFI again and see if you can increase multiplier.

I would not advise flashing a beta bios in the future especially if it is a feature that does not apply to you (adding IVY support).

edit: I should read better. You already tried the button so ignore that and use the jumper. You can also pull the CMOS battery for good measure. Wait 5 minutes... put everything back in and fire it up. You might also try to re-flash 2.00 or 2.10 again if that doesn't work.