So here's the deal folks.
I have a stock Dell Optiplex 755 SFF with a C2D processor (Socket 775 mobo). My research online tells me that I can upgrade my CPU up to a C2Q Q9650, however I want to get either a Q6700 or Q9550 (leaning toward the Q9550). My question is: will I need to upgrade my power supply and/or my cpu cooling fan, and if so, what do you recommend, bearing in mind the size of my case and that i want to keep my expense for all components under US$60 if possible (used/refurbished ebay prices)?
Thanks for the help.