Does manual undervolting disable XFR on Ryzen 1800X?

[donbarron]

I'll be installing a Ryzen 7 1800X in a system that now has a Ryzen 5 which I have currently undervolted.

I want to keep temps in check more than push the CPU to a max OC, so I plan to undervolt.

AS I understand it, overclocking disables XFR on X series Ryzen chisp, but does the same apply to undervolted chips where the multiplier isn't changed?

 

[CountMike]

Undervolting without lowering multiplier would just introduce instability. Every processor needs certain voltage for certain frequency and if it gets less voltage it will shut down.

 

[donbarron]

I undervolted my Ryzen 5 1600 to 1.15 volts @ 3.7 GHz OC stable (tested), so I'm willing to attempt manually undervolting to get better temps. I'm simply asking if it will disable XFR on the chip to do so.

I understand that every chip is different, but the disabling of XFR on OC is a design feature.

 

[CountMike]

‚As far as I know, only x models have XFR and only when TPU I Or TPU II are enabled. Than it also sets voltages as needed. As soon as voltage is set to anything but auto, XFR is not engaged.