upgrading pc

1. What is the purpose of the computer? What all applications and games are you going to run? (Stupid answers like 'gaming' or 'office work' will not work. Be exact. Which games? Which applications? Avoid the word 'et cetera.') Ans: Gaming(Screen recording while playing),C++,Video Editing...

Okay so I want to upgrade my PC for gaming. I currently have a COMPAQ CQ3559IN desktop.The current specs are as follows:- Intel core i3 550 @3.20 Ghz with stock cooler Seagate 500 gb hard disk MSI 2ab4 motherboard 2+1 GB 1333 mhz DDR3 RAM 250w Power Supply Windows 7 Home Basic DVD-RW...