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unfortunatly the new amd chips don't oc as well as the c2d but I think 8500 is certainly not worth almost a hundred pounds more than the 6400BE so it cant claim bang for buck there imho as for the quad core most peeps that follow the trends are ditching their quads because they dont fully utilise them and get better results with the newer chips ,
intel 2160 cos i was promised bang for buck i am still waiting to see...
personally, i wish i had taken the 5000+ BE... amd has done me proud for a long time...