Please have patience and go for an (old) Intel.
I am saving a lot of money with my rig, because I underclock my CPU and still can run my games on Ultra. It depends of course how 'old' the game is. For example my i7 3770k. It runs at 0.7Volts @2700Mhz. My mem runs @1866 but those can do 2133Mhz. My stock TDP of my CPU is 77Watts compared to AMDs TDP. Sure you have 1000 cores on a AMD chip, but what for? No games are supporting 4 or more cores so that is basically Marketing. I pull with my 3770k, which you can overclock it to 4,5Ghz or higher I don't, a 220Watts from my wall. That is with all my drives, CPU, MEM and my old videocard. My other 'internet' pc pulls 100Watts max with a simple i3 3220.
You have to do the math as far in performance and what you get. My energy bill is important and I get no lag and still pull nice FPS's in my games. AMD is for now nice for consoles and they are good at that. I was a AMD user untill the Core2Duo came out from Intel.
Good luck with an AMD with a TDP os 120/130Watts that is still slower then my i7 3770k. Check for a i5 3570k.
Cheers!