SP120 RGB Running at Max RPM

[Samward123]

Evening all, so i recently i rebuilt my PC into a Corsair 460x case and brought the three pack of SP120 RGB Fans. I plugged all of the RGB cables into the lightning controller than comes with the case as it has 6 slots available so that's 6 fans in total 3 in the front 2 on the AIO and 1 rear, then connected all of the front 4 fans up using 2 Y Splitters. I also have a H100i V2 which is all connect properly to the motherboard via the CPU_FAN like the pump and the 2 fans. Now then problem is that the speed of the CPU fans and the rear fans are running at max rpm. It says this on the Asus BIOS i use but doesn't allow me to turn them down on the BIOS nor on Corsair link. If someone could help me figure out the problem i would gladly appreciate it!

PC Specs are i7 4790k, Asus Z97P, H100i V2 and a Corsair 460x.

Many Thanks!

 

[devbiker]

First, the fans on the AIO *must* be PWM fans. The SP-RGB fans are DC fans. They will always run at full speed as they will always get the full 12V.

That's likely the issue with the rear fan as well - it header is either configured as PWM or is PWM only.

BTW- make sure that the cooler is set to full speed/100%. Failure to do so will result in the cooler not getting the 12V that it requires. Bad things happen then.

 

[Samward123]

I think i sorted it, i changed the fans from PWM to DC made it quieter and also ran the fan unlity on my motherboard which made them even more quieter so i think it's sorted now. Thanks for the reply mate!

 

[devbiker]

No, you didn't sort it. Well, maybe for the rear fan.

Here's the deal: If you changed the CPU_FAN mode to DC and ran the fan utility, it's going to be altering the voltage on that header. That means that pump (and the fans) won't get the full 12V. Now, while that slows the fans down, it also means that you pump won't be operating properly. And it will likely damage your pump.

That pump, as I said before, needs to have the full 12V at all times. It MUST be set to full speed/100%. What kind of bad things happen when you don't do this? Pump failure.

See http://forum.corsair.com/v3/showthread.php?t=174442, Section B.

The real solution for the fans on the cooler is to get PWM fans. DC fans cannot be controlled on that cooler.

 

[Samward123]

Right i think i understand now so i need some PWM Fans which i have spare and put them on the AIO and also the pump is running at 1950RPM which is set on corsair link.

I hope this is what i need to do?

Thanks

 

[devbiker]

If you want to control the fan speed on the radiator fans, yes.

AND you need to make sure that the fan header that is powering the pump is set to full speed/100%/Fan Control Disabled. Running the fan utilities changes this if you don't disable speed control on the header. On Asus motherboards, this is Q-Fan Disabled.

 

[Samward123]

Right so i have now installed the PWM fans that came with my AIO and made sure it is on 100% speed. Also QFan is also disabled.

Thanks for your help..

 

[devbiker]

By the way ... if you want quieter PWM fans, take a look at the Corsair ML fans. They are good drop-in replacements for the stock fans, which are notoriously loud at high speed. That said, it's not likely that you really need high speeds on the fans with that CPU.

 

[Samward123]

Yeah i may look into buying some of them after christmas

Again thanks for the help, i will now remember not to do that lol!

Thanks