Biostar TH67XE Motherboard

Voltage Regulator

The Biostar TH67XE comes with a seven-phase voltage regulator circuit for the CPU. Of the seven available phases, four are used to generate the CPU main voltage (Vcc, a.k.a. Vcore), two are used to generate the voltage required by the integrated memory controller and the L3 memory cache (VTT), and one is used to generate the voltage required by the CPU integrated video controller (VAXG). Therefore, this motherboard has a “4+2+1” configuration.

The
CPU voltage regulator uses ferrite-core coils, which present less power loss than iron-core coils, meaning higher efficiency, and low RDS(on) transistors, also meaning higher efficiency. All capacitors used on this motherboard are solid. Please read our Everything You Need to Know About the Motherboard Voltage Regulator tutorial for more information.

Figure 7: Voltage regulator circuit

Figure 8: Voltage regulator circuit

The memory voltage uses a circuit with two phases, ferrite-core coils, and low RDS(on) transistors.

This motherboard has two groups of LEDs for you to monitor the phases of the voltage regulator circuit. The main CPU phase LEDs are labeled PH1 through PH4, the video controller phase LED is labeled PHS1, and the memory controller (VTT) LEDs are labeled VTT_LED.

Figure 9: Phase-monitoring LEDs

Figure 10: Phase-monitoring LEDs