The voltage regulator of the ASUS H81M-A has three phases for the CPU. The voltage regulator is controlled by a Digi+ ASP1258A integrated circuit, using a digital design. Each phase is driven by two PH7730DL transistors, as shown in Figure 7.
The motherboard uses solid electrolytic capacitors and ferrite coils.
If you want to learn more about the voltage regulator circuit, please read our tutorial on the subject.