VDD fluctuates between 1.1-1.6v?

Hiya chaps. Read this site a lot but this is my 1st topic, here goes.

PC died this morning and wouldn't boot, during POST i notice VDD was highlighted red and was at 1.3v. I underclocked to 1.1Ghz and finally managed to get into windows.

My PSU is a bit old so I headed off to Maplin to pick one up, got a Quiet PC 350w (and very nice and quiet it is too!). After installing that tho, I still have the same problem a low VDD, also noticed with Epox's USDM that 5VSB is hovering around 4.8v.

Any thoughts?

Sys Spec:

Epox 8RDA+3
XP2500
512DDR 400
80GB IDE HD
CDRW