What games will need to be played on a budget system that will show a drastic bottleneck for that cpu? Those game should be expected to be played at lower settings anyways.
The difference between a $100 dollar gpu and a $200+ gpu would be drastic regardless of the cpu at this price point. immediately better resolutions and textures and smoother experience overall. maybe even screen capture if he at <30 fps and <1080p on game and recording. nonsense but just another example of usage.
ALSO the future remains bright if he gets a better gpu. He can get an a8-a10-athlon on that same FM2 socket. Quad-Core with an RX 470-80. Those CPU's are still a bottleneck for the highest end of gaming, but that's not where we are at here.
I understand that there IS technically a bottleneck in my recommendation. i accept that. but at this level of a system, any bit will count. Not to mention in 6 months when he wants to upgrade again and there is no path. he will have to buy a whole new system. FM2 socket dead and stuck with a paperweight GPU.
The better the GPU you can afford now, the more money it will save you in the long run.
Example. Not 100% legit.
Get a ~$300 GPU now...... save up for 6 months for a ~$300 CPU+MOBO combo with at least Zen or 4 core 8 thread Intel. SSD for next Christmas or birthday.
300 now, 300 then. instead of 100 now, then another upgrade, then another upgrade. Keep the hardware at a low level you will never be able to get out of a bottleneck.
You need to break that barrier and use that as your build path.
I'm too lazy to make a pcpartpicker build but I can make some comments:
#1 Don't get an fx 9590. It'll lag horribly behind a 5820k on games and video editing. And personally I don't find a 5930k worth it compared to a 5820k, so I'd recommend a 5820k for you for a CPU.
#2 None of those mobos work with a 5820k;you will need an x99 mobo for that.
#3 You need ddr4 ram for a 5820k. I'd recommend using four sticks to help speed up rendering.
#4 You could wait until the end of June to see the performance of the rx 480 and then decide on your GPU.
#5 I wouldn't recommend that ssd since sequential read and writes don't matter much. If you want a high performance ssd I'd recommend a Samsung 950 pro.
Thats all I can think of! I'm sure someone will come along and make a pcpartpicker build