Decent low-noise 80mm fan?

[atxcyclist]

I have a computer that has an 80mm intake fan, but the one I have is old and quite loud. This is a fan that will be powered off the PSU directly, so no speed control from the board.  I haven't bought an 80mm fan since 2007, so no clue what's out there. It would also need to be a standard 25mm thick fan as it sits in a "cage" that attaches inside the case.

[LIGISTX]

4 minutes ago, atxcyclist said:

I have a computer that has an 80mm intake fan, but the one I have is old and quite loud. This is a fan that will be powered off the PSU directly, so no speed control from the board.  I haven't bought an 80mm fan since 2007, so no clue what's out there. It would also need to be a standard 25mm thick fan as it sits in a "cage" that attaches inside the case.

Noctua is always the answer. Not cheap, but the best.

 

Get one that is either 1500 RPM, or one that comes with low speed adapters.  

[atxcyclist]

Just now, LIGISTX said:

Noctua is always the answer. Not cheap, but the best. 

It'd be worth it, it's a file server that sits a few feet from my work area so it runs 24/7. Aside from this fan it's almost inaudible. I'll see what Noctua products are available out there.

[LIGISTX]

Just now, atxcyclist said:

It'd be worth it, it's a file server that sits a few feet from my work area so it runs 24/7. Aside from this fan it's almost inaudible. I'll see what Noctua products are available out there.

 

2 minutes ago, LIGISTX said:

Noctua is always the answer. Not cheap, but the best.

 

Get one that is either 1500 RPM, or one that comes with low speed adapters.  

Make sure the check which you get. They usually have multiple versions of every fan. But they are the best, hands down. 

[mariushm]

You have almost 230 fans here, all 80mm and up to 25.4mm thick (25mm is the standard, 25.4 is within tolerances, just metric vs imperial thing) : https://www.digikey.com/short/zf73vf

 

Sort by noise, get one with lower number, though you should also pay attention to the airflow amount, maybe don't pick super silent one that's moves very little air. 

If you're lucky, the psu will have a label on the fan with a model number, which will point you to a datasheet that gives you the airflow, static pressure, or at the very least rpm ... but if not it should at least say the current and then you can look for fans with approximately the same power consumption. 

 

 

You could spend 35$ on this : https://www.digikey.com/product-detail/en/ebm-papst-inc/8412NGLV/381-2499-ND/441672

 

or you could spend 14$ on this: https://www.digikey.com/product-detail/en/sanyo-denki-america-inc/9S0812L402/1688-1751-ND/6192467

 

This one is silent enough, but can be made even more silent ... it works down to 6v, so for example, you could simply add 1-2 generic diodes (1n400x for example) in series with the voltage wire to drop the voltage by 0.7v x diode count and lower the rpm this way.

Or just use a 50 cent 7809 regulator to run the fan at 9v instead of 12v.