ECS A990FXM-A Motherboard
Voltage Regulator
Contents
The CPU voltage regulator circuit of the ECS A990FXM-A has six phases for the CPU main voltage (VDD a.k.a. Vcore) and one for the CPU VDDNB voltage (integrated memory controller, HyperTransport bus controller, and L3 memory cache). Therefore, it uses a “6+1” configuration.
Figure 8: Voltage regulator circuit
Figure 9: Voltage regulator circuit
This motherboard uses solid ferrite-core coils, which present less energy loss than iron-core coils (i.e., they improve efficiency), solid capacitors, and transistors with low RDS(on).
The motherboard has a series of LEDs for you to monitor which phases are active.
Figure 10: Phase-monitoring LEDs
If you want to learn more about the voltage regulator circuit, please read our tutorial on the subject.