Find a fan of the same size with the same 2-pin connector.

First, welcome to Vogons!

Second, how straight forward PSU fan replacement goes depends on a few things.

To start, you'll need a fan of the same physical size (60x60x15mm). Depending on the fan you buy, if it has the same style two pin connector in the same configuration, that shouldn't be an issue. If it doesn't, you may need to swap the physical connector from the old fan to the new fan.

The other item that can cause issues is current draw. The fan you are replacing is rated at 0.16A. If the replacement fan has too low a current draw, there is a risk it may not spin up properly. I just went through this trying to use a Noctua fan on a 286 computer's PSU. It wouldn't consistently spin up, so I replaced it with a different fan with a higher current draw.

TL/DR: If the specs of the new fan match the specs of the old fan, you should have no problem.

^ easy way...

What I'd do, being a smerterse, would be to look for a 10mm thick fan that can meet voltage, CFM, current specs, and might actually be a quieter one with a lot more blades, this only works for finding fan replacements for stuff older than 15 years, as modern stuff might already have the minimum thickness for that power motor. Having got thinner fan, cut gaskets out of craft foam and mount fan on them, gaining a mm or two spacing off the rear grille, which cuts noise and vibration transmission. Also if you have a punched out from the metal fan grille instead of a hole with a chrome wire grille on, cut out the punched metal and get a 60mm chrome wire grill instead for it... sometimes there's one on there over the top of the punchout grille, tryna make it fancy after the fact or something. However, some ppl will want everything to look exactly the same as factory and this is a mod.

Agreed with the above. Can only add to make note of the orientation of the fan connector as it may be possible to inadvertently plug the replacement fan in backwards. Also, since you plan to replace the old fan anyway, you could power it on just to check if the polarity is what it appears to be as in the pre-ATX days a lot of manufacturers tended to do some funky stuff with the wiring (like changing out colors to non-standard or non-sensical).
I'm probably being overcautious with the last bit but with this old (and often harder to replace) stuff I'd rather be safe than sorry 😜

Buy a matching Noctua fan, they come in a complete package with a lot of choice of connectors and even a simple solderless way to reuse the previous fan connector. Not to mention they are very silent and reliable.
I can only regret they don't come in smaller size than 4 cm.

Xanxi wrote on 2023-02-10, 21:36:

Buy a matching Noctua fan, they come in a complete package with a lot of choice of connectors and even a simple solderless way to reuse the previous fan connector. Not to mention they are very silent and reliable.
I can only regret they don't come in smaller size than 4 cm.

There are no Noctua fans in 60x60x15mm. Plus, they might run into the above mentioned issue of lack of adequate current draw since Noctua fans use relatively little power.

Superred is good fan maker and oldest, rare for oddball name but true. I see them on old vintage equipment too.

Move the red wire and solder directly into 5v. This could work as long as bearing is good.

Cheers,

SUNON. HA series. You can't beat Vapo bearings for noise, though yes, the grill can make more noise than the fan itself.

But there is a price to pay for well-below 30dBA noise levels and that's airflow. HA are slow rotating on purpose. If you have cramped case, or PSU running hot, or living in hot climate, or just tend to stuff your machines too close to walls and not clean them every now and then - perhaps you'd rather have a more classic MF series fan. And lastly for PSUs where fan sits at odd angle you'd want a ball-bearing if you are going to use it a lot. If not Vapo will do fine as well.

wow, a psu fan with an actual connector. i've blown up a lot of newer psu's with my athlon xp slamming the 5v rail. i always cut out the 12v fan before tossing it since even older quality psu's still used sleeved bearing fans which don't last forever. when they get noisy i just grab a fan off the pile and use mini wire nuts to splice it in.