Could some voltage settings, perhaps combined with lower ambient temperature, cause instability?
Lately, once every few weeks I find my system, which stays on 24/7, has become unresponsive or rebooted overnight. The wireless keyboard and mouse can't connect to the receiver, and there is no SSH response from another computer. System logs show no errors or crashes. It seems to happen at the coldest time of the night/early morning, around 6-8am, with the system idle, though not sure if that's coincidence.
Most settings are on Auto, with just the following voltages changed manually:
CPU Core Voltage [Offset mode]
CPU Offset Mode Sign [-]
- CPU Core Voltage Offset [0.06875]
CPU SOC Voltage [Manual mode]
- VDDSOC Voltage Override [1.00000]
DRAM Voltage [1.35000]
1.8V PLL Voltage [1.80000]
1.05V SB Voltage [1.05000]
I'm thinking of reverting to Auto one by one (except for DRAM voltage of course) until the instability ceases, though it's difficult to test since it happens very infrequently. The CPU undervolting is the most meaningful change to me, with the purpose of having as quiet a computer as possible by keeping heat down.