How to fix pump speed instability for Valkyrie V360 MERLIN?
The screen tearing in the dark forest sections was brutal, with frame times jumping wildly between 14-42ms, which totally killed the horror atmosphere. I traced it back to the Valkyrie V360 MERLIN pump; in Auto mode, it was fighting with the motherboard's PWM signal, causing the flow rate to bounce randomly between 2200-3100 RPM. My first instinct was to lock the pump to max speed in the software, but that introduced a high-pitched coil whine that was driving me insane. I went into the BIOS, flipped the pump header from Auto to DC mode, and locked the voltage at a solid 12V to keep the flow constant. Monitoring via RTSS, the CPU stayed between 64-71C and frame intervals tightened to 16-19ms. I did run into a weird issue where the radiator fans stopped momentarily after the voltage lock, but a quick reseat of the fan hub fixed it. Coolant temps now sit at 32-36C. After a three-hour torture test, the rendering lag is gone and RAM temps are stable at 58-63C.
