What is the best upgrade for a motherboard and Intel 775 Socket Cpu to buy for a gaming System? If you don't want to upgrade to the new i5 or i7 technology? And that will play any game for the next couple of years? I want to build a new gaming system under $400.00 bucks if possible? I have Intel P4 3.0 800 Ghz single core CPU running on a 775 Socket Mobo with a Nvivdia 9800 GT Video card... What is the best upgrade for me that will last at least 3 yrs which will enable me to play any game in my cpu without any problem? Until I upgrade to the new i7 Technology? I mainly play WOW, SIMS 3, and Modern Warfare...