Hi, this will be my first time ever upgrading a processor I currently have a Intel cpu g3240 @ 3.1 ghz and I am upgrading to I7 -4770s 3.1 ghz quad core I am buying this from ebay without a cooler do I need to purchase a new cooler or will my old one work ok? I am mostly using it fr Team Fortress and Left for Dead games but not sure for future games.