How to fix power spikes on the ROG STRIX X870-A Snow Edition?
My PC was just blacking out and rebooting for no reason, usually right when the loop loading screen hit. It turned out the default Load-Line Calibration on my ASUS ROG STRIX X870-A GAMING WIFI Snow Edition was way too aggressive, causing the CPU voltage to dip below 1.05 V during transient loads, which triggered a hard reset. I tried switching Windows to 'High Performance' mode first, but that actually made the crashes happen more often—I was honestly starting to question my own sanity. I eventually went into the advanced BIOS and switched the Load-Line Calibration from Auto to Level 3, while bumping the DRAM voltage from 1.35 V to 1.38 V. Running AIDA64 stress tests, the core voltage ripple dropped from 0.12 V to 0.04 V, and I finally hit 24 hours of uptime without a single error. I did hit a wall with memory checksum errors when I first tried lowering voltage, but loosening the secondary timings fixed it. VRM temps sat between 52℃ - 58℃. MemTest86 confirmed zero errors after four passes, and the board stayed cool at 52℃ - 58℃.