Hi. I am new to pc building and sort of a noob and a really tight budget as well and i was considering of upgrading a really old pc like ddr2 old instead of building a new one My budget is like 150$ and i am going to buy a graphic card and as the title suggests which one should i buy? and i am going to buy a IntelPentium (R) E6600 processor and 3-4 gb ddr2 ram will they be compatible? and are processors compatible to all mobo's? as i mentioned i am new. Any answer will be appreciated. Thank You,