Quote Originally Posted by spoolindsm127 View Post
You have to enable either 'Extreme OV' or 'Extreme OC'. I forget which one.

I had also asked earlier regarding what the different 'PWM Frequency' settings mean. I think they were Auto, 1x, 1.33x
It's Extreme OV.

QPI PWM Frequency acts exactly the same way as CPU PWM Frequency. It increases the number of times the power FETs switch per second to generate the clock signal. I think intel spec is default 250KHz. But who knows what asus is using as base. We would need to measure it. It might be 500KHz. In any case. If 250 is base, that makes 1.33x 332KHz, or if it's 500KHz 1.33x is 665KHz.

A higher PWM Frequency lowers output ripple, but makes a lot more work for your FETs(lots more heat).

My guess is auto selects 1x below a certain BCLK and 1.33x above a certain BCLK. I played with QPI PWM Freq hoping it would allow me to lower my QPI voltage, but it did not help. Maybe at extreme bclk.