OK thanks for the responses guys.
At least I know its my system thats causing the issue. I honestly thought a C2D at 4ghz would be enough.
Looks like I need to upgrade then
Time to spend some cash on a motherboard, processor, Heatsink and memory. What do people recommend? I've got around £500. Is this worth it http://www.overclockers.co.uk/showproduct.php?prodid=BU-001-GI&groupid=43&catid=2053&subcat= or is there anyting better
Don't buy a bundle unless you don't want to do it yourself. You'd be looking at an i5 3570k, decent Z77 motherboard (the one I've got in my signature is decent and reasonably priced) and some low profile DD3 1600 MHz RAM. Heatsink for the CPU you can get a Noctua at the top end or Gelid Tranquillo at the low end.
Make a thread in General hardware and they'll sort you out
