Fractal Define R6 PWM Fan Hub

geoffwbaOC · 19 Oct 2019 at 11:46

Having just upgraded my PC with an MSI B450 Tomahawk Max board and Ryzen 5 3600 into the Fractal Design R6 case. I am looking at the fan set up using the Refine 6 PWM fan hub. I have four 3-pin fans currently in use but if I've understood things correctly I need to install at least one PWM 4-pin fan to be able to monitor all the system fans using something like Speedfan software or the BIOS screen. Also, when connecting the PWM hub to the MB, should I use the CPU_FAN connector or one of the SYS_FAN connectors ?

Len Dananey · 19 Oct 2019 at 18:22

Can plug it into any fan header on the motherboard. May help https://www.techpowerup.com/forums/...ess-fan-hub-runs-at-same-speed-as-cpu.241842/

LuckyBenski · 20 Oct 2019 at 10:57

All 3 and 4-pin fans have a speed reading wire. The extra pin is for PWM control, rather than feedback.

So you should find that reading speeds works fine but there will only be a single reading, usually from the fan connected to the first slot.

Connect to any slot, if the CPU cooler is connected separately, let that fan keep the CPU_FAN header.

nwatson6 · 20 Oct 2019 at 12:25

I have the same case and mboard with a 3700x, I am running cpu fan directly off CPU header and the case fans are connected to the hub with the hub plugged into fan 3 header, but as they are 3 pin connectors there is no speed reported in the bios, case fans seem ok, CPU fan goes up and down like a yo-yo, so not happy with that at the moment, might replace stick cooler with a dark rock 4 I have sitting around, just need some thermal paste and the enthusiasm to swap it over.

Steveocee · 24 Oct 2019 at 12:41

nwatson6 said:
I have the same case and mboard with a 3700x, I am running cpu fan directly off CPU header and the case fans are connected to the hub with the hub plugged into fan 3 header, but as they are 3 pin connectors there is no speed reported in the bios, case fans seem ok, CPU fan goes up and down like a yo-yo, so not happy with that at the moment, might replace stick cooler with a dark rock 4 I have sitting around, just need some thermal paste and the enthusiasm to swap it over.

You will get that with recent Ryzen. Is the BIOS fully up to date?

nwatson6 · 24 Oct 2019 at 21:32

Steveocee said:
You will get that with recent Ryzen. Is the BIOS fully up to date?

Yes BIOS is up to date, might need to wait for newer BIOS improvements?

Steveocee · 25 Oct 2019 at 10:32

Have you tried setting a custom fan curve? Sometimes the default fan curves can be "stepped" so you can really notice the differences between temps but if you make your own with more of a curve or slope then you may notice the changes less.