Yep, sure can, the fx-4300 is a great mid-range CPU that overclocks very well. But don't just pick any one, do some research on the brand and model you are looking at. Some come with good gpus already, upgraded psu's already, and have mobos able to handle mild OC. And you never know, if you can show the parents you are really serious about learning exactly what is worth the value and what it takes to do something the right way, they may decide to let you do it the right way and build your own. It's a big step, and much responsibility, but in the end you can hold your head up and proudly say, "l did this". Take the time, get serious, its well worth the investment.