Swapping PSU Fan

Hey all,

I have a Corsair RM850i inside of a Corsair 600Q and the PSU Fan in this case design is used as an exhaust. Problem is there aren't enough Exhaust Fans in my setup (drawing air through the front and bottom and out of the back) and the PSU fan is pretty darn weak. I mean, it's a light whisper of a breeze at 100%...

So I was thinking about replacing the fan inside of the PSU with a Noctua Industrial iPPC Fan as I have an extra. Does anyone know how to go about this as I remember something about PSU fans being 135mm for some odd reason (ahem, probably things like this ahem cough cough).

But anyways. Ideas or dissection time?

yeah this will work and yes the fan is 135mm with a 4pin mini pwm header. so you can try and find 135mm pwn fan, mod for a 120/140mm(if it clears) then get a pwm adapter or splice the old onto the new fan. should be pretty easy.

edit: and then post pics!

Kwaz said:

So I was thinking about replacing the fan inside of the PSU with a Noctua Industrial iPPC Fan as I have an extra. Does anyone know how to go about this as I remember something about PSU fans being 135mm for some odd reason (ahem, probably things like this ahem cough cough).

But anyways. Ideas or dissection time?

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I did this with my sig PSU. The original blower in my psu stopped working so I bought a Noctua 140mm replacement, drilled some holes for the screws to go in at about 135mm set apart and hooked the pwm connector to my mobo. Runs great, good airflow, with it being a Noctua runs super quiet, fan speed controlled via motherboard and looks good too compared to the original clear Superflower fan.

Matthew Kane said:

I did this with my sig PSU. The original blower in my psu stopped working so I bought a Noctua 140mm replacement, drilled some holes for the screws to go in at about 135mm set apart and hooked the pwm connector to my mobo. Runs great, good airflow, with it being a Noctua runs super quiet, fan speed controlled via motherboard and looks good too compared to the original clear Superflower fan.

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But does it have LED's rofl? It's the 2000's all over again!

This is exactly what I was thinking about doing.

Someone in the 600Q case review mentioned putting 60mm fans in the rear vent as well so I think that I'll couple them both. God I've missed quiet sound dampened cases.

No leds, I hate leds in pc cases as it makes it look like a cheap toy, the exception being with builds that have custom w/c loops with colour dyes inside and fan led colour's to match.

You can put any 140mm fan into the psu, be it led or not and drill the holes for the screw mounts 135mm setup apart.

Pics tomorrow

I did exactly this to my RM550. After the swap though, it seemed like the PSU refused to turn on the fan when it was under load (the RM series don't spin normally until they hit a predefined load %). So, I popped a grommeted hole in the side of the PSU casing and now control my PSU fan with a mobo header.

VanGoghComplex said:

I did exactly this to my RM550. After the swap though, it seemed like the PSU refused to turn on the fan when it was under load (the RM series don't spin normally until they hit a predefined load %). So, I popped a grommeted hole in the side of the PSU casing and now control my PSU fan with a mobo header.View attachment 31603

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Yes my progress has been stalled due to a similar issue. I actually thought it might be causing a hard reboot I'm experiencing but now that I've routed the fan elsewhere that doesn't seem to be the problem.

I believe there's a cable routed incorrectly or a short. Unfortunately I'm out of time for now.

Hopefully in the next few days I can get it resolved.

VanGoghComplex said:

I did exactly this to my RM550. After the swap though, it seemed like the PSU refused to turn on the fan when it was under load (the RM series don't spin normally until they hit a predefined load %). So, I popped a grommeted hole in the side of the PSU casing and now control my PSU fan with a mobo header.View attachment 31603

Click to expand...

I had to "replace" the fan in my coolermaster 1200w with another fan. It was 135mm and I just used a 120mm fan and connected to a fan controller. It worked great for years.