My system reboots without reason after 1 to 3 hours of use, PSU maybe?

Hey all my AMD AthlonXP 2200+ which uses the EPoX EP-k*7A+ mainboard seems to randomly reboot after 1 a 3 hours of use it's very random sadly I think it's the PSU if it s I seek an Enermax WG425P or similar that has a +5 Volt rail that supports 32Amps or more 36Amps as this PSU goes.

Not sure where I can get thsoe except the one s I Seen on ebay are all from USA sadly.

Any other diea's on what it could be and hopw I could find that out?

The PSU it uses now is the Antec True Power 550 Bronze 80+ PSU.

Well it seems I need a PSU that is clear but I may need to get the mainboard checked since there is some black material in the mainboard's PSU power connector:

Here a closeup of the power cable when I pulled it out:

It is as if the plastic of that part of the power connector melted or something.

Backfire I guess I would need to ship you the mainboard for inspection or repair, as for a good PSU any idea's what I can do with that, the Antec I have is history, what is a good PSU unless you have any good ones laying around, yea let me know.

Quote from Backfire

Sorry for the delayed reply.
I'm at home with the flu. So I'm not as often online as usual.

I've got your eMail and will reply there soon...

- Backfire -

Many thanks and get better soon!