Sometimes, corrupt BIOS configurations or stuck fan controller states cause the motherboard to panic and default to 100% fan speed and higher voltage. You can reset the BIOS to factory defaults: Turn off the computer and unplug the power cord.
Updating BIOS on any system carries risk, but on the MS-7613, the dangers are heightened. First, an incorrect or corrupted BIOS file can brick the motherboard, turning it into an electronic brick with no recovery unless a hardware programmer is used. Second, because the board lacks modern dual-BIOS or USB flashback features, a failed flash often means permanent damage. Third, “hot” modified BIOS files from unofficial sources may contain unstable microcode or incorrect device initializations, causing overheating (literally “hot” in temperature), boot loops, or component failure.
The H55 chipset on the MS-7613 runs notoriously hot. The stock passive heatsink is inadequate.