Hi guys i want to ask you will be a bottleneck with i5 4430 and RX 580 8GB. I just want to play at ultra preset settings. And i don't know what to buy RX 580 or 570 please answer me.
That CPU can handle way faster cards than that. So no worries about the CPU bottlenecking the card with either of those. But unless you are getting those older cards at a steel, I'd consider something a bit more up to date. Even the GTX 1060 3GB or RX-470 4GB is way faster than those. And either require much less power.
Err the RX 570 and 580 replaced the 470 & 480 so are not old.
As for bottleneck generally no but CPU heavy games it will. BF1 is known to stress out overclocked i5's and ideally wants an i7. I was playing Project Cars today with it frame capped at 60fps and my 4670k OC'd to 4.3Ghz was running between 85-95%, if I wasn't frame capping Id easy hit 100% usage. A 4430 wouldn't be able to hold 60fps if my CPU is only just able too.