You could try overclocking yuor computer but that may set it on fire if you don't know what your doing as me and my friends have already found out.Or you could delete every useless never used program from your computer or organize it onto flash drives then delete them off you computer.But if you are going to overclock your computer,make sure that you hace taken the side off your computer,have multiple fans goin and keep the room as cold as possible,also make sure you don't have any athlon hardware installed as it sucks for overclocking.And DO NOT LEVE YOUR COMPUTER UNATENDED,if you can get an overclocking software you can control what per cent faster it is,i would say no more than 10% for a normal computer.But like I said i would not do this if you don't have enough money for a new computer.Or you could always just get the latest nvidia graphics card and most powerful microprocesser out there.