Question : Problem: Power supply voltage warnings

I have an older asus motherboard (a7n8x-wm, maxtor drive recently failed in the computer), and i am watching the hardware monitor and:

Vcore Voltage: jumps slightly from 1.616 to 1.648 (text stays blue color)
3.3V  Voltage: jumps sligtly from 3.728 to 3.760 (text stays blue)
5V Voltage: jumps from 5.456 to 5.510 (text goes RED when voltage hits 5.510)
12V Voltage: stays constant at 12.768 (text stays blue)

The power supply is a generic POWMAX 400W.  Here are my questions:

1.  Should the voltages be constant?  Is slight change ok?
2.  Should I worry that the 5V voltage jumps to 5.510 and goes red?
3.  Should I replace the powersupply?

Please answer all questions.

Thanks,
Trevor

Answer : Problem: Power supply voltage warnings

The variance in the voltage is quite good => from 5.456 to 5.510 is only 0.54v, as rid noted;  BUT the voltage is more than 10% above the specified voltage (well outside the ATX spec) ==> that is NOT "good regulation."  (IF the measurement is accurate --> see following comments)

As for your questions:

"1.  Should the voltages be constant?  Is slight change ok? " ==> As noted above, a slight change as the load changes is okay; but it should be a very slight change (what you're seeing is fine)

"2.  Should I worry that the 5V voltage jumps to 5.510 and goes red? " ==> I would be a bit concerned that the 5v rail is so high;  BUT it is not "jumping" to 5.510;  it's actually changing very little (as rid noted) ... but it IS too high.   This could, however, simply be a measurement error.   If the system is otherwise running reliably, I'd ignore this.

"3.  Should I replace the powersupply? " ==> Depends on the answer to #2 (is the system running reliably??).   If the answer is No, the you should replace the power supply;  otherwise it's probably okay.