r/buildapc•
RGHTre

Help with cpu_fan on mobo

So the case I got (Enthoo Evolv) has a PWM hub to control the fans. I'm using the stock cpu fan that came with my i5 4460, and my mobo (ASRock H97M Pro4) only has one 4-pin cpu_fan connector, so I can't use both my case fan hub and heat sink fan off of the same socket. It has an additional 3 pin socket, though. What should I do?

Posted Jan 9, 2016, 6:01 AM UTC

18
christes•

You should be able to plug the CPU fan into a three pin socket. The grooves are designed to line up properly The fourth wire controls the speed, though, so it would always be going at 100%.

2
RGHTreOP•

Thank you! Follow up and entirely unrelated question—my R9 390x comes with two power cords (8 pin and 6 pin) and both of the power cords split. My PSU is modular and I have the attachments for both types of connectors, do I plug 2 of each in since the GPU's power cords are split, or do I just plug one of each in?

2
christes•

Double check if its 2-to-1 or 1-to-2. I've seen both.

Asssume it's 2-to-1 like you say, I wouldn't worry about it. That's presumably for people with weak 12V rails on their PSU. If you have a decent PSU, you ought to be fine.

Just to be sure, what is your PSU?

2
RGHTreOP•

It would be 2 from the PSU into 1 slot in the GPU and my PSU is a 550w Supernova 80+ Gold

2
christes•

There are a couple of SuperNOVA types (e.g. GS, G2), but from what I can tell they all use a single 12V rail. So it really shouldn't matter since your 6- and 8-pin PCIE connectors are drawing from the same source. I wouldn't use those splitters.

2