VRM Overview

Specifications

The ASRock X570S PG Riptide features an 8-phase VRM configuration; two sets of four Vishay SIC654 power stages controlled by PWM doublers. The two SoC phases are independent. An absolutely be bizarre setup, it makes more sense when you look into the way it has been tallied up.


For the VRM controller, ASRock has implemented the UP9505S. It is a 4+2 PWM phase controller. The ability to set the switching frequency is absent in the BIOS.


The ASRock X570S PG Riptide uses Vishay SIC654 power stages for all phases. There are eight stages for the Vcore and two stages for the SoC. These power stages each support a maximum of 50 A of continuous current.

The ASRock X570S PG Riptide has a maximum output of 500 A, with 400 A dedicated to Vcore.


The ASRock X570S PG Riptide is using UP1911R intelligent doublers. These support four-phase output with two single inputs. The reason four doublers aren't on the back is that each of these is effectively two doublers in one.

At first glance, I had my doubts that this was a good design choice. While smart doublers do exist, many are just dummy ones that do nothing except to take one signal and turn it into two. By going this route, ASRock technically saves money in the grand scheme of things and still provide the same level of performance as four basic PWM doublers.