Originally Posted by mtuccio
In the BIOS when you set AI Tuning to Manual it should expand the BIOS Selections down the screen. Under this, should be a setting for FSB. You need to change this to change the frequency of the CPU. The running frequecy is determined by multiplying this FSB number by the CPU multiplier. The CPU multiplier is changed in the CPU Information screen in the BIOS. The first selection in the BIOS for the cpu should be Unlock Multiplier. Set this to enable. After this, I like to exit the BIOS and return back upon a Save and Exit. You should also set your CPU Vcore to 1.3250 V and your NB Vcore to 1.45 V to start your overclock. In Addition, you most likely will need to set your RAM timings manually. Start at 266 FSB and slowly work your way up in frequency.
Hope this helps....
When the BIOS screen expands down after setting the AI Tuning to Manual the only setting that has reference to FSB is the FSB Termination Voltage. The setting labled "CPU Frequency" has the number 266 by it which makes me think it is acctually the FSB mhz setting BUT that is the one that I can't change for some reason. When I arrowkey over that setting the info bar to the right says "Valid input value: 100 - 650". By all means I should just be able to change this setting as I'm sure it is the FSB but I can't. I sent an email to Asus support but who knows how long they'll take to respond.
Also, I have already enabled the Unlock Multiplier but then I go to change it from 9 to, lets say, 6 but that doesn't work either. I select the setting and hit enter and no menu comes up.
I have version 1.03G of the P5BD