Can I fix FireCuda 540 thermal throttling in MGSV?

This was unbelievable. I'm using a top-tier 2TB drive, and it still decided to throttle during stealth loads—a total disaster. The FireCuda 540 controller hit 82-88℃ during peak 7000MB/s read/writes, triggering a hardware-level frequency cut that crashed my speeds from 7GB/s down to 1.2GB/s. I almost threw my mouse. I tried lowering the sampling rate in the software, but the stutters remained because the I/O bottleneck was purely hardware. I ended up going the aggressive route: I replaced the stock thermal pads with high-conductivity ones, tightened the heatsink, and forced PCIe Link State Power Management to 'Off' in the BIOS. Monitoring via HWInfo showed the controller peak temp dropped from 88℃ to a manageable 62-68℃, and the read/write curves stopped spiking. I noticed a tiny boot delay after tightening the heatsink, which I fixed by slightly adjusting the mounting bracket. Idle temp is now 40℃, and full load hits 66℃. I exported the temp-to-speed logs, and the fan speed is stable at 1400-1600RPM.
Category:Performance Evaluation Last updated:April 21, 2026 12:53 PM