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Not bad. Considering current RAM prices 4GB (what type is it?) should be worth £70 - so all the other kit is gravy
The CPU is basically a high clocked pentium 4 with hyperthreading and the graphics card is a professional version of the Geforce 6800 (something like a 6800 GTO). When you say "duel mobo" do you mean it is a dual CPU socket board or something else?
Any idea what you will be using it for?