Delta Electronics EFC0812DB 80x80x15mm Cooling Fan, 48.8 CFM, 3800 RPM, 41 dBA, 0.5 Amp, 4-pin PWM connector

While it's very powerful, it's a bit loud, and it appears to change it's speed periodically. When it changes speed, tapping it a bit causes it to go back to full speed. Maybe I have a defective fan or my mount is causing this (stress on the frame maybe?).The noise level is roughly twice that of other fans I have which are 1/2 as powerful, so the noise level is expected, I guess. I just wish it was a little quieter.

Good product, good price, arrived on time. Well done.

It's listed as 3800rpm, but my Asus AM1I-ITX motherboard, using AI Suite 3, surprisingly reports the fan goes up to 4500rpm maximum.Sounds like a jet engine at 4500rpm, but it pushes an amazing amount of air.

Works great, is a little loud, but the speed control on my Asus Sabertooth motherboard helps a lot to run it at low speed.

It's a fan. It goes around and around to move air. This one does it quickly and fairly silently, which is more than I can say about some others.

There's no way for me to connect this to my computer. The supplied cable has some weird mini 4pin connector. See my photos. I'm hoping this was just a mistake by the seller. I've contacted them and am awaiting a reply. I hope they do right and send me the fan with the appropriate 4pin PWM connector. Will update this review if they do.

Perfect fan for the ITX size machine I just built. It fits nicely in the small chassis and moves plenty of air.

Best fan that I have purchased and not as loud as I expected it to be.