thank you both for the reply on a sunday night.
The PSU is about 550watts but as you say, Chunkier GPU`s require more power and cooling etc.
I think i`ll sell the system on e-bay for £100 and splash out on a new gaming machine.
Does anyone recommend CHILLBLAST as PC specialists and would you have an Intel I5 or I7 based PC or go for AMD.
also Which is better RADEON or NVIDIA chipsets as graphics cards?