I'm taking the PSU to a friends tonight to test with his digital multimeter, that seems the quickest route to ruling that in or out.
I'm from the UK, budget isn't too much of a worry as long as it solves the issue. That said, I'd like it to be closer to £50 than £100 if possible. Whatever, it's going to be cheaper than a new CPU :)
I was looking at this
http://www.ebuyer.com/product/132563...roduct_reviews and this
http://www.ebuyer.com/product/116522...w_order_by=RUF working on the basis that the psu calculator on
http://extreme.outervision.com/PSUEngine suggests a power output of 430 and your PSU support page suggests a 30% upgrade on that value to allow for future upgrades etc. I have a tendency to leave my pc running 24/7 as it acts as a media server to 2 network devices and my PS3.
Thanks for everyone's attention this this problem, you've all been a great help.