PSU fan replacement

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RedDinosaur

8 posts

Wannabe Geek

#289558 12-Sep-2021 20:49

My PSU fan every now and then makes a loud rattling noise. I opened it up, cleaned the dust and tried to see where I could put some oil in but the top is sealed. So looks like I'll have to replace it.

The current fan is a Yaln Fan D12SH-12 - 120mm, 12V, 2200rpm, 88.0 CFM and 40 dB
https://www.yateloon.com/en/product-38837/DC-FAN-SERIES-120x120x25.html

What specs do I need to look for when replacing the fan? Should the CFM be at least 88.0 CFM? Or is this the max? The PSU, Corsair VS650, states that the fan is "thermally controlled, so it only spins up when needed."

Thank you

SomeoneSomewhere

762 posts

Ultimate Geek

Lifetime subscriber

#2777155 12-Sep-2021 21:41

Basically any 12V fan of the appropriate dimensions should be usable - a high-RPM one like you have now, rather than a silent/low-speed one.

Ideally you want higher for both airflow and static pressure. I can't find a specification on pressure though.

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mrdrifter

477 posts

Ultimate Geek

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#2777164 12-Sep-2021 22:23

And be very careful if you have the PSU open, the components in there can still kill you even unplugged if you don't know what your doing.

Tinkerisk

1998 posts

Uber Geek

#2777242 13-Sep-2021 10:07

I usually have the first look against fan noise at www.noctua.at

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RedDinosaur

8 posts

Wannabe Geek

#2777244 13-Sep-2021 10:15

Tinkerisk:

I usually have the first look against fan noise at www.noctua.at

Well, when it isn't making the rattling noise, the fan noise is fine. It just becomes defected at times.

RedDinosaur

8 posts

Wannabe Geek

#2777246 13-Sep-2021 10:19

SomeoneSomewhere:

Basically any 12V fan of the appropriate dimensions should be usable - a high-RPM one like you have now, rather than a silent/low-speed one.

Ideally you want higher for both airflow and static pressure. I can't find a specification on pressure though.

So I don't need to care about CFM? Just RPM? I mean, you could have rpm higher then 2200rpm, but worse CFM then currently?

Zeon

3861 posts

Uber Geek

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#2777247 13-Sep-2021 10:22

mrdrifter: And be very careful if you have the PSU open, the components in there can still kill you even unplugged if you don't know what your doing.

TBH I've repaired a number of switch mode power supplies in the last year and even after only just being power off I read negligble voltages on the capacitors. Haven't died (or even felt a shock/tingling) yet..... I think most seem to have some kind of draining resistor....

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SomeoneSomewhere

762 posts

Ultimate Geek

Lifetime subscriber

#2777265 13-Sep-2021 11:27

Yeah, it's a legal requirement I think.

But you never know when you're going to run into the cheap one that ignored it, or one were it broke off somehow.