I hope this helps someone as we've spent 2 weeks ironing out this annoyance. The symptom we have is randomly the machines are rebooting when the machine is idle. Only when idle. We've consistently and reliably had a whole lab of machines crash in the exact same way. Eventlog shows: A fatal hardware error has occurred. Reported by component: Processor Core Error Source: Machine Check Exception Error Type: Cache Hierarchy Error Processor APIC ID: 7 How to fix? All you need to do is set to Disabled Global C-State Control in the UEFI. Specs of lab machines; 1800X - h110i X370-Pro - bios 0515 32GB (16x2) F4-2666C15D-32GVR ASUS 1070 strix 1tb 960 evo ssd 1000 evga p2 psu We involved AMD and ASUS and after a lot of fiddling we isolated it down to this. AMD were the most helpful. ASUS less so....
DISREGARD. JUST LOAD THIS BIOS. http://dlcdnet.asus.com/pub/ASUS/mb/SocketAM4/PRIME_X370-PRO/PRIME-X370-PRO-ASUS-0604.zip
