Yo, so I built my PC back in 2015 and basically haven't watched much tech for a while now. My PC is currently running with the GTX 970 which is a great card, but I was told to upgrade for 4K gaming. I have a card in mind for it, but I'm not sure if I should upgrade my CPU for this? It's a Intel Core i5 CPU (I forget the full title) so it could be a little older for the PC. That's where I would need help to be honest since I know my GPU stuff but don't have much of a clue for the CPU side. The GPU I want is a 1080 TI since I hear that's the best for 4K gaming at the moment. I might upgrade the ram to 16GB since I saw a few cheap sticks. Should I upgrade the PSU? The one I have now was perfect for what I needed back then. It's a 450W PSU. If so what would be recommended? I'm basically a little clueless on the CPU side and if I need a new PSU for this. I'm already pushing the bank with the GPU and monitor so I would like to pick up the PSU and CPU for under 500 dollars/euros if possible. If I need to pay a little more then I will, but I don't really want to spend like 2,000 on this project.