CPU_PWR2 (extra 4pin cpu connector)

[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.

[Ravas2013]

What I did, but do it on your own  responsibility, was I modified a 6 pin pci-e power to 4 pin cpu power 2 and It works no problems. Its not that hard only thing is you need to take your time and not f up the pin out.

[Ben17]

1 minute ago, Samoboleon said:

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?

Yes it's fine to leave one 4 pin disconnected on the power supply 

So yes it would be fine to plug in one 4+4 pin and another 4 pin leaving a 4 pin disconnected 

[Samoboleon]

3 minutes ago, Ravas2013 said:

What I did, but do it on your own  responsibility, was I modified a 6 pin pci-e power to 4 pin cpu power 2 and It works no problems. Its not that hard only thing is you need to take your time and not f up the pin out.

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

[Samoboleon]

3 minutes ago, Ben17 said:

Yes it's fine to leave one 4 pin disconnected on the power supply 

So yes it would be fine to plug in one 4+4 pin and another 4 pin leaving a 4 pin disconnected 

OK thanks, this will mean I will have to get another power supply (oops) 

[Ben17]

1 minute ago, Samoboleon said:

OK thanks, this will mean I will have to get another power supply (oops) 

I think it's safe to not plug the 4pin though so you could try that and then replace the psu if you need to?

unless your trying to do high overclocks?

[Jurrunio]

That extra 4pin is as useless as tits on a fish, 9900k will not pull enough power to need it without liquid nitrogen.

[Ben17]

Just now, Jurrunio said:

That extra 4pin is as useless as tits on a fish, 9900k will not pull enough power to need it without liquid nitrogen.

I would agree with you tbh

[Samoboleon]

8 minutes ago, Jurrunio said:

That extra 4pin is as useless as tits on a fish, 9900k will not pull enough power to need it without liquid nitrogen.

I'll give it a go first but pc parts picker warned against it 


considering there's a rtx 2080 super, do you think it would draw a high current

[Jurrunio]

2 minutes ago, Samoboleon said:

onsidering there's a rtx 2080 super, do you think it would draw a high current

no because the CPU power connector powers the CPU exclusively

[Ravas2013]

16 minutes ago, Samoboleon said:

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

Well its so simple, I used a sim removal tool to remove the pins and  rearrange them. 2 12v pins and 2 ground and that is it. Nothing special.