Quieter Fans

[psd]

Super thanks

[psd]

Hello Group,
urgent question:

If I am replacing Power supply fan with a Noctua,
the power supply fan has red and black leads. the noctua has black, yellow, green and blue.

I assume the two blacks are common, which color on the nocuta corresponds to the red?

also which way should the fan face outward? With sticker outward or inward?

Please help soon as my machine is dismantled and out of use until I resolve!

[zemlin]

Fan should exhaust - so judging by the photo it looks like sticker out.
Yellow lead is typically for tach, which does not apply.

Editing this because I didn't see the new fan has 4 leads. Don't know on that one.

[psd]

Thanks I just resolved, I realized I purchased the wrong fan, but I had one of the correct ones with only two leads out. All is working. Thank you