beside a few people here, a few realized the guy already owns an amd mainboard which is completely compatible with amd cpus series fx 4300 - 8350. where is the point in him getting intel? it is indeed better at single threaded power which manages to pull more and better performance in fix on mmorpgs and a few games that are straining the ass of the cpu. the difference will not be so big that you will lose over 10 fps. if that is 2-6 fps..... except you want to play tera and that's where the real huge problem will come with amd cpus due to the bad optimization of that game. in rest everything will work perfectly with the apps you want to use and even with rendering, sculpting, vortex, editing bla bla. If you can sell that amd maiboard at exactly the same price you have bought it for, then yes go for intel. if not stick with it. Getting an amd fx 8320 is a good choice for it's price. you are a bit future proof with the cores and can overclock that kitty to 8350's power or even more when needed. (k nothing is future proof but for that money...). i own fx 6300 rig as my television media, internet, business and gaming device. i can tell you it works perfectly. I even went the trouble of switching the gtx 770 i own in my i5 4670k rig in to the fx 6300 rig and i can tell you for all games that i sometimes play : Trove, C9 seal, Crysis 1,2, Skyrim, As. creed, Blade and soul the difference wasn't bigger than 9 fps MAXIMUM and that only for c9. the only 17 fps difference was between my 4930k and fx 6300... and that was in Dragonica which well ye not many people play and you can't call that game an performance judging mean.
given that you own the mainboard already go for the fx 8320.
what the guys mentioned above is true that intel is above. But not really so much right now that you will tell a huge blowing difference between them apart. except like i said you want tera at best performance. At that and which is the only down that exists you will curse the game maker and the amd cpu XD
Edit: some mistakes. my eyes burn like hell right now...