Trying to figure out what the point in this is ?

Minusorange · 31 May 2018 at 13:46

https://www.overclockers.co.uk/phanteks-pwm-fan-hub-black-ca-009-pt.html

It's a PWM Hub, but it only allows 3 pin connection to the fans

So while the hub is running PWM from the mobo header, it's actually turning the fans into Voltage control which kinda defeats the purpose of having the hub no ?

Or am I missing something ?

Minusorange · 31 May 2018 at 14:06

PiKe said:
Basically yes, it converts the PWM into voltage control for the other fans, modulating their speed.

If the fans are running in voltage control, then what is the point in having a PWM hub that isn't actually PWM ?

This one https://www.overclockers.co.uk/xspc-8-way-pwm-splitter-hub-sata-powered-black-v2-fg-009-xs.html makes sense, it's a PWM hub that controls the fans in PWM

The Phanteks one though just seems utterly pointless and to be honest misleading by calling itself a PWM hub

Minusorange · 31 May 2018 at 18:00

chroniclard said:
Believe the same one is bundled with my case, works fine.

Like @doyll says it's not about it working, it's about it being a PWM hub but not actually doing any PWM on the fans which kind of defeats the purpose one would get a PWM hub for

this allows up to eight 3-pin fans such as PWM fans to be controlled from compatible motherboards

I think it's very misleading to any one who doesn't realise that their PWM fans will work with the hub, but they won't be using PWM

Minusorange · 31 May 2018 at 20:00

chroniclard said:
Isn't the end result the same?

Not if you buy PWM fans for a PWM experience

Minusorange · 4 Jun 2018 at 23:42

chroniclard said:
Not really sure why

@doyll explained it to you

Several differences, two of which are quite significant;
1/ PWM pulses the power so fan uses less power to maintain low speeds instead of lowering 12v to lower voltages with the by-product being heat.
2/ Pulsed power maintains more power in the motor / motor has more torque power at lower speeds often resulting is lower idle speeds for higher rpm rated fans.

Basically the fans are quieter and giving the same cooling because thanks to PWM they can run at a lower RPM than in voltage mode where too low volts = fan no work, PWM basically lowers the RPM threshold at which a fan is capable of spinning

But at least now you can experience why I asked the question of what's the point in the hub when it doesn't offer proper PWM control