I try be a "read only" member because I am not a sparky but I am a computer scientist which might apply in this case so I figure I'll throw in my two cents.
There are some beyond cheap computer power supplies that have been known to have spectacular failures. It wouldn't surprise me if it was ultimately related to something like that.
As to the load, I agree with the post above. My reason is purely from experience...now it's not great, but at work we've been known to have upwards of 25 computer towers (and a couple monitors with KVM switches) on a single 15A circuit. No idea as to how loaded it really is but it holds up fine.
