Question about PWM Fan Splitters

[Nightz]

I am new to fan splitters and fan hubs etc, am i correct in saying the fan splitter will still allow for the 3 pin (non pwm) fans to increase and decreased in speed depending on voltage and will not be at a fixed speed?
Thanks

[_I_]

3pin uses voltage control
4pin molex is also voltage control
4pin fan header is pwm

fan header pinout
pin 1 = gnd
pin 2 = +12v (or variable voltage control)
pin 3 = rpm/sense (input from 1 fan only if using a splitter)
pin 4 = pwm (output)

you cannot use pwm and voltage control at the same time

if the splitter only uses the mobo header, it will work with voltage control
if it uses a molex/sata power it will run 12v to the fans for pwm control

[Bad 💀 Motha]

If it's supports 4 pin pwm, it will always support a 3 pin DC fan, yes.

[Nightz]

Ursprünglich geschrieben von _I_:

3pin uses voltage control
4pin molex is also voltage control
4pin fan header is pwm

fan header pinout
pin 1 = gnd
pin 2 = +12v (or variable voltage control)
pin 3 = rpm/sense (input from 1 fan only if using a splitter)
pin 4 = pwm (output)

you cannot use pwm and voltage control at the same time

if the splitter only uses the mobo header, it will work with voltage control
if it uses a molex/sata power it will run 12v to the fans for pwm control

Thanks, it only uses the mobo header

[_I_]

if you use a 3pin fan on 4pin header set to pwm, the fan will be at 100% all of the time since its not voltage controlled

[Nightz]

Ursprünglich geschrieben von _I_:

if you use a 3pin fan on 4pin header set to pwm, the fan will be at 100% all of the time since its not voltage controlled

https://www.amazon.co.uk/gp/product/B01LVWB5U0/ref=ox_sc_act_title_1?smid=A3EI57K2UTQ3A5&psc=1 So if i use two 3 pin non-pwm fans on this will it run at max speed?

[_I_]

if the header is set to pwm, 3pin fans will be at 100%

[Nightz]

Ursprünglich geschrieben von _I_:

if the header is set to pwm, 3pin fans will be at 100%

How would i tell if its set to PWM?

[_I_]

check bios settings for that fan header

[Bad 💀 Motha]

Bios has those fan settings.
PWM vs DC