Samoboleon

Recently I've been looking at new parts and planning an upgrade but the new Z390 motherboards require 8pin + 4pin cpu connections.

My power supply is a corsair rm650i and only has the 4+4pin (8pin) connector. 

I've already bought an rtx 2080 super and im looking to pair it with an i9 9900k and I will most likely push it to 5ghz on all cores.
 
I have read online that the second connection may be required for overclocks on both the cpu and gpu which I am likely to do. Should I look into getting a new power supply that supports the extra 4pin power connector?

I've been looking into corsair's RM850i which has 2x 4+4 cpu cables. If i were to buy this power supply instead, would it be okay to plug in both 4+4+4 and leave the other 4 disconnected?

I hope I've made this clear.

damn I wouldn't want to do this and risk breaking anything. I'm far too shaky to be messing with pins lool

thanks for the suggestion but I don't trust myself to do this