Bottleneck isn't the worry. A quad core should be fine. But I mean the RX 480 features a good 8GB of VRAM. Very helpful. Also it's HBM and also DX12 and OpenGL is pretty upper hand. Though a 1060 might do too. I mean if you want one earlier, then RX 480. If you go looking at the 1060 it might be a lot later down the line, and see how cram it offered, and how well dx12 and other rendering things play out.