Thanks so the 4 pin controls the pwm, so can I connect that 4 pin to my optional cpu connection or any 4 pin fan?
** PHANTEKS ENTHOO PRIMO - THE ULTIMATE WATERCOOLING CHASSIS **
- Thread starter rjk
- Start date
Thanks so the 4 pin controls the pwm, so can I connect that 4 pin to my optional cpu connection or any 4 pin fan?
It can only be connected to a PWM header.
Not all 4-pin headers are PWM. The fact is in 99.99% of motherboards only the CPU fan and CPU opt are PWM. And sometimes the CPU opt is not PWM. I suggest using the CPU fan first to be sure the PWM is working to control fan hub. Than move it to CPU opt and see if it also works.
Not all 4-pin headers are PWM. The fact is in 99.99% of motherboards only the CPU fan and CPU opt are PWM. And sometimes the CPU opt is not PWM. I suggest using the CPU fan first to be sure the PWM is working to control fan hub. Than move it to CPU opt and see if it also works.
So having read the last few comments I thought I should experiment with my PWM hub and my MSI Z97 Gaming 7 mboard.
Having tried various combinations I am left puzzled.
This is what the MSI manual suggests are the pins for the 5 fan headers on the Mboard:
What I found was, with the Molex connector connected to the PWM hub, all my fans ran at 100% regardless of which header they were connected to and I could not manipulate them at all with MSI Command Centre / BIOS.
Interestingly with the PWM hub connected to either CPU fan header I could NOT control the fan speed and all fans connected to it ran at 100%.
On this particular mboard only headers Sys 1/2/3 allowed PWM functions and control via software of the fan speeds of the PWM hub. However with the Corsair H75 fans connected to either CPU1 or 2 I could control their speed without any problem.
I have my phanteks PH-F140XP PWM Fan connected to Fan 1 on the PWM hub.
Also very interestingly when the hub was connected to the CPU2 header without the Molex connected, there was a distinct smell of electrical burning coming from the header or hub - couldn't decide which! Needless to say I quickly turned the system off and all is well again.
Having tried various combinations I am left puzzled.
This is what the MSI manual suggests are the pins for the 5 fan headers on the Mboard:
What I found was, with the Molex connector connected to the PWM hub, all my fans ran at 100% regardless of which header they were connected to and I could not manipulate them at all with MSI Command Centre / BIOS.
Interestingly with the PWM hub connected to either CPU fan header I could NOT control the fan speed and all fans connected to it ran at 100%.
On this particular mboard only headers Sys 1/2/3 allowed PWM functions and control via software of the fan speeds of the PWM hub. However with the Corsair H75 fans connected to either CPU1 or 2 I could control their speed without any problem.
I have my phanteks PH-F140XP PWM Fan connected to Fan 1 on the PWM hub.
Also very interestingly when the hub was connected to the CPU2 header without the Molex connected, there was a distinct smell of electrical burning coming from the header or hub - couldn't decide which! Needless to say I quickly turned the system off and all is well again.
Last edited:
Soldato
Took mine off the case and installed both my swiftech fan hubs.
So having read the last few comments I thought I should experiment with my PWM hub and my MSI Z97 Gaming 7 mboard.
Having tried various combinations I am left puzzled.
This is what the MSI manual suggests are the pins for the 5 fan headers on the Mboard:
Indicates only CPU headers have "speed control" on 4th pin. I would guess that to be PWM, but...
What I found was, with the Molex connector connected to the PWM hub, all my fans ran at 100% regardless of which header they were connected to and I could not manipulate them at all with MSI Command Centre / BIOS.
Nothing in Bios for setting headers to PWM?
Interestingly with the PWM hub connected to either CPU fan header I could NOT control the fan speed and all fans connected to it ran at 100%.
On this particular mboard only headers Sys 1/2/3 allowed PWM functions and control via software of the fan speeds of the PWM hub. However with the Corsair H75 fans connected to either CPU1 or 2 I could control their speed without any problem.
Make no sense. "speed control" on 4th pin is on CPU headers and I"m assuming "NC" is no control.
I have my phanteks PH-F140XP PWM Fan connected to Fan 1 on the PWM hub.
I would use a 3-pin fan for testing and setup.
Also very interestingly when the hub was connected to the CPU2 header without the Molex connected, there was a distinct smell of electrical burning coming from the header or hub - couldn't decide which! Needless to say I quickly turned the system off and all is well again.
That is strange.
thats what ive done 3 radiator fans and 5 case fans connected to my swiftech hub,
Could not get the fans off 100% with the Phanteks hub either even with the bios on my gigabyte gaming 7 set to silent???
That bottom front panel is not easy to open
Looking good!
Best way I know of to remove bottom front is to open door, remove bottom 5.25" bay grill / cover, reach in with fingers behind the cross piece, grip it and the front cover between fingers and thumbs and squeeze until it clicks/releases and the front falls open against thumbs.
The problem seems to be the plastic cross piece flexes back just a little when pushing on cover trying to release it. Gripping the cross piece with cover stops that flex and it clicks / releases much easier.
Best way I know of to remove bottom front is to open door, remove bottom 5.25" bay grill / cover, reach in with fingers behind the cross piece, grip it and the front cover between fingers and thumbs and squeeze until it clicks/releases and the front falls open against thumbs.
The problem seems to be the plastic cross piece flexes back just a little when pushing on cover trying to release it. Gripping the cross piece with cover stops that flex and it clicks / releases much easier.
Looking good!
Best way I know of to remove bottom front is to open door, remove bottom 5.25" bay grill / cover, reach in with fingers behind the cross piece, grip it and the front cover between fingers and thumbs and squeeze until it clicks/releases and the front falls open against thumbs.
The problem seems to be the plastic cross piece flexes back just a little when pushing on cover trying to release it. Gripping the cross piece with cover stops that flex and it clicks / releases much easier.
Works a treat cheers
Indicates only CPU headers have "speed control" on 4th pin. I would guess that to be PWM, but...
Agreed that is what it seems to suggest. Although what are the pin configurations on the lead going to the Phanteks PWM hub?
Phanteks PWM pinout is standard PWM 4-pin pinout:
pin 1 = ground
pin 2 = 12 volt constant voltage
pin 3 = rpm signal from fan
pin 4 = PWM signal from motherboard to fan PCB
Nothing in Bios for setting headers to PWM?
BIOS just gives you a 'Smart fan mode' which is ON and allows you to set 0-100% fan speed at 4 temp points for CPU1/2 and 50-100% for SYS1/2/3.
Sorry, I don't know MSI motherboards so can't help.
Make no sense. "speed control" on 4th pin is on CPU headers and I"m assuming "NC" is no control.
Agreed makes no sense at all unless the Phanteks PWM hub pins match those of the SYS1/2/3 header.
Not possible Phanteks PWM hub is 4 pin pinout as above and SYS1/2/3 headers are only using 3 pins with pinout:
pin 1 = ground
pin 2 = speed control using variable voltage or pulsed 12 volt.
pin 3 = RPM from fan
pin 4 = NC = Not Connected / No Control
I would use a 3-pin fan for testing and setup.
Switched to a non-PWM Corsair fan as you suggested, made no difference.
Also very interestingly when the hub was connected to the CPU2 header without the Molex connected, there was a distinct smell of electrical burning coming from the header or hub - couldn't decide which! Needless to say I quickly turned the system off and all is well again.
That is strange.
I don't understand where the power is coming from in the SYS1/2/3 headers as there is no +12V pin?
Answered above. Pin 2 is power that is controlling the speed with either variable voltage or pulsed 12 volt. 3 pin and 4 pin PWM fans all use same pinout for first 3 pins:
pin 1 = ground
pin 2 = power (12volt on PWM signal controlled / variable voltage or pulsed 12v on 3 pin control)
pin 3 = RPM signal from fan.
What makes it confusing is the way motherboard motherbumping manufacturers / companies give misleading specifications and misleading labels.
Agreed that is what it seems to suggest. Although what are the pin configurations on the lead going to the Phanteks PWM hub?
Phanteks PWM pinout is standard PWM 4-pin pinout:
pin 1 = ground
pin 2 = 12 volt constant voltage
pin 3 = rpm signal from fan
pin 4 = PWM signal from motherboard to fan PCB
Nothing in Bios for setting headers to PWM?
BIOS just gives you a 'Smart fan mode' which is ON and allows you to set 0-100% fan speed at 4 temp points for CPU1/2 and 50-100% for SYS1/2/3.
Sorry, I don't know MSI motherboards so can't help.
Make no sense. "speed control" on 4th pin is on CPU headers and I"m assuming "NC" is no control.
Agreed makes no sense at all unless the Phanteks PWM hub pins match those of the SYS1/2/3 header.
Not possible Phanteks PWM hub is 4 pin pinout as above and SYS1/2/3 headers are only using 3 pins with pinout:
pin 1 = ground
pin 2 = speed control using variable voltage or pulsed 12 volt.
pin 3 = RPM from fan
pin 4 = NC = Not Connected / No Control
I would use a 3-pin fan for testing and setup.
Switched to a non-PWM Corsair fan as you suggested, made no difference.
Also very interestingly when the hub was connected to the CPU2 header without the Molex connected, there was a distinct smell of electrical burning coming from the header or hub - couldn't decide which! Needless to say I quickly turned the system off and all is well again.
That is strange.
I don't understand where the power is coming from in the SYS1/2/3 headers as there is no +12V pin?
Answered above. Pin 2 is power that is controlling the speed with either variable voltage or pulsed 12 volt. 3 pin and 4 pin PWM fans all use same pinout for first 3 pins:
pin 1 = ground
pin 2 = power (12volt on PWM signal controlled / variable voltage or pulsed 12v on 3 pin control)
pin 3 = RPM signal from fan.
What makes it confusing is the way motherboard motherbumping manufacturers / companies give misleading specifications and misleading labels.
Last edited:
360mm fitted eventually 
on page 11 it says optional led strips? anyone know where we get these
not sure if the below are compatible
http://www.overclockers.co.uk/showproduct.php?prodid=CA-007-PT&groupid=2362&catid=2674
on page 11 it says optional led strips? anyone know where we get these
not sure if the below are compatible
http://www.overclockers.co.uk/showproduct.php?prodid=CA-007-PT&groupid=2362&catid=2674
I have come to the conclusion that my Phanteks fan hub just isnt working in PWM mode. I have tried all sorts of combinations. I have plugged in a Phanteks PWM fan to CPU1 or 2 and have controlled its RPM from 0-100%. However with the fan hub connected to either I cannot control the speed of any of the fans.
Can someone please confirm that it is mandatory to plug in the MOLEX for the fan hub if there are more than 6 fans connected to it (because that is not what it suggests on the sticker on it) and that they have a MOLEX connected to their PSU and PWM functions still work!
Can someone please confirm that it is mandatory to plug in the MOLEX for the fan hub if there are more than 6 fans connected to it (because that is not what it suggests on the sticker on it) and that they have a MOLEX connected to their PSU and PWM functions still work!
Soldato
Swiftech 8-Way PWM Cable Splitter get this is way better,my stock one is in the box as ive never used it.
Caporegime
I ended up just connecting my dual cpu fans to the twin headers on the board. The rest of my case fans are ran via a fan controller. Added bonus is there are very few visible cables coming from the mobo. Everything tucked, (aka jammed) behind the mobo tray.
Soldato
Aye the case has been well thought out for cables.