Sudden Loss of Power... but computer works fine...

I've had my dual 1.8 for about three years now... it's not in the category of G5's that had the power recall.
I have it hooked to a Belkin UPS backup, but for the last week or so, the computer will abruptly lose power. I haven't installed any new apps or hardware for some time (new RAM about 2-3 months ago... but system profiler says it's all good).
Any thoughts as to what's going on? I've backed up all my work, similar to the peeps that built nuc fallout shelters back in the day. I'm awaiting the big one!

I have the same problem on my G5. Just randomly powers off suddenly. It happens in spurts and then stops for a while. Usually happens when I am working in or loading ProTools software...but not always. I think the power supply can't handle extra power needs or something like that... One time turning off my air conditioner seemed to help... Hard to say though since it happens randomly... FRUSTRATING!!!!! not in the list of G5's for the power supply recall... What do i do???

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