I would not change the cpu; 9xxx quads new or used are just as expensive as some newer cpus. Try your games first and see if the frame rates are acceptable with the 560ti. And list a budget for the board/cpu/ram if you decide to change it out. I recommend you sell your stuff used FIRST before ordering anything if funds are tight, and even do without a pc for a few days until the new stuff arrives. I use craigslist and anandtech's for sale forum. Without a budget, I'm only guessing as to what you can get.