How to stop VRM overheating on Onda A520-VH-W during heavy battles?
The battlefield went from fluid to a literal slideshow right when the action peaked, which is absolutely lethal in a strategy game. Checking HWInfo, the VRM section on the Onda A520-VH-W was hitting 102-108℃, causing the CPU to panic-throttle from 4.2GHz down to a pathetic 0.8GHz. I tried capping the processor state at 99% in Windows, which dropped temps to 85℃ but increased turn times by 30%—totally unacceptable. I ended up gluing three small copper heatsinks onto the chokes and setting a CPU Voltage Offset of -0.05V in BIOS. HWInfo then showed VRM temps plummeting to 78-84℃, with clocks staying rock steady between 3.8-4.1GHz. I actually messed up the first attempt with too much thermal glue, which actually raised temps by 2 degrees until I swapped to a thinner layer. Now the CPU stays at 72-78℃ under full load. After a long Prime95 run, the frequency spikes are gone, and the thermal failure is finally sorted.
