How to fix voltage dips on ASUS ROG STRIX Z890-A in GTA V?
Whenever I hit downtown Los Santos, my FPS would tank from 140 down to 42 out of nowhere, making my character look like they were glitching through the sidewalk. After digging into the logs, I found the VRMs on my ASUS ROG STRIX Z890-A GAMING WIFI S Snow Edition were struggling with transient loads, causing Vcore to swing wildly by 0.08V - 0.12V. I first tried enabling Ultimate Performance mode in Windows, but that was a disaster—CPU temps spiked to 92°C - 98°C while the stuttering persisted. I eventually dove into the BIOS, switched the Load-Line Calibration (LLC) from Auto to Level 3, and set a manual CPU Core Voltage Offset of +0.025V. Using HWiNFO, I saw the voltage ripple tighten from 1.18V - 1.26V down to a rock-steady 1.22V - 1.24V, and my frame times dropped from a messy 15-32ms to a consistent 7-11ms. I actually blue-screened three times trying to push an aggressive overclock initially, and only got it stable after backing the Ring Bus frequency down to 4.2GHz. Now the VRM temps sit around 52°C - 58°C with fans humming at 1200-1400 RPM. The voltage curve is finally flat, and the 7-11ms frame time is locked in.
