Originally Posted by Nightingale
Originally Posted by ehume
I just did a quick and dirty test.
The AP-29 runs at 900 rpm on 5v.
The AP-15 runs at 750 rpm on 5v.
Holding my hands in front of both, the AP-15 was pushing way more air.
I recommend you look in my sig and see how to convert AP-29's to PWM. Also: this
review gives a detailed how-to on the AP-29.
I already read your wonderful thread, it's where I got the idea to mod the fan with PWM. I plan to run 12v with PWM.
Question Ehmue would I just be better off getting a 35mm San ace since they are going for $19.99 here.
San Aces make more noise -- 40 dBA for a 9G1212H1011 -- but they push a lot more air. For example, I measured my my 2150-rpm GT's pushing 106 and 107 cfm (rated 69 cfm). In the same test box, my 9G1212H101's pushed about 158 cfm (rated 99 cfm). I haven't measured the cfm of my AP-29 yet, but it is rated 83 cfm, so I would expect it might push 130 cfm at 3000 rpm.
The reason these fans push so much more than what they are rated is that they are industrial fans: their purchasers can test them, and they should match their specs, no matter what manufacturing variables there are. So they way over-perform their specs.
That said, the San Ace basically runs at speed, while the GT can be modulated with PWM if it is modded.
The AP-29 is rated for 5mm H2O static pressure (0.2 inch).
The San Ace 9G1212H101 is rated for 7.2mm H2O static pressure (0.283 inch). That might not mean much is your rads are not tight -- do not have high fpi.
You must make up your own mind.