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Originally Posted by Skybird
I have no battery backup. the talk above was only about that small Lithium cell that motherboards are used to be equipped with. We also have absolutely stable power lines over here, no blinking, no blackouts or brownouts, nothing.
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1. That battery doesn't matter. You can even run computers without that battery, but you'll probably have to reset the time and other BIOS settings on every cold boot.
2. You mean you do not have any obvious instability. That you cannot easily see the instability doesn't mean there are no brief errors, or slow fluctuations. (i.e. errors that occur to fast or to slow to be obvious without measuring equipment)
3. It is possible for a power supply circuit to be more stable at high load than at low load. But I have never worked on any PC switching PSU, and there must be many different designs out there, so it's impossible to say if this would be the case for your system, and I don't know if there is a type of damage that will cause such instability when a PSU in good condition would not fail.