i currently have a pc i built 2 years ago. it has an fx 6300 overclocked to 4.5 ghz stable, for 2 years. it runs a crossover 2560 x 1440 monitor. it has an xfx r9 280x in it. i am building a new computer for my kids, they will be using an lg 2560 x 1080 monitor. i have purchased a xfx r9 290x and an fx 8320. i already plan to have the 290x run the crossover monitor, and the 280x run the lg. my question is should i bother using the 8320 with the 290x? or being that the 6300 has been stable at 4.5 for 2 years just stick with that? its easier to just put in graphics cards than switch cpus especially after all the tweeking i had to do to get it stable at that speed. will there be a noticeable improvement over the 6300. also i would be overclocking the 8320 as well.