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PC power supply and motherboard automatic switchon
It seems likely that the PC motherboard's automatic switchon function causes voltage spikes on 5V and 12V lines killing SSD drives
- and possibly other harddrives, even motherboards and other PC hardware, after 20-30 powerups, possibly later or sooner.
Probably most PC power-supplies (not just the cheap ones) are not tuned/tested to regulate properly when switching on at 80V input cap and charging in 10-30 msec to 300V (more likely to cause problem with 230-240V mains than 110V).
- Solution: do NOT enable the motherboard automatic switchon function unless the powersupply is known to regulate properly at the sudden voltage climb of the power supply input capacitor.
- BIOS programmers: apply 200 msec delay before the "immediate powerup switchon"