Pros: kicks air out

Cons: kicks sound out

Overall Review: will buy more since I have a big heat problem in side my computer

Pros: great fans for server, run at about 14000 RPM, a little lower than the official speed. great volume of air, they move a lot of air, and this is a very important factor in a fan. They are much better than the average fan.

Cons: The make a lot of noise, however thats Ok since they will be used on servers. The screws that come with the fan are a little too wide, they did not fit the holes in my case, I used a different set of screws slightly thinner. The fans do not have a front protector screen like some fans do, so make sure no cables are near the fans.

Pros: High CFM, not deafeningly loud at 14k RPM. Ball Bearings should give it a long life in a hot server environment.

Cons: Not the cheapest fans, but the specs are worth it.

Overall Review: Bought 6 for a 1u dual Xeon e5620 box. These move some serious air, but as expected 6 are quite loud. This is not an issue for me as I don't plan on being within 300 miles of this server on average.

Pros: These fans move a ton of air, hence the RPM and CFM ratings

Cons: at high RPM these will make your PC sound like a small jet engine. Be warned. 60dB is much louder than you think and a case will only amplify it

Pros: Powerful, Compact, High air flow, Good Quality Components I use this on a light that was melting gobo gels, it quickly fixed the issue

Cons: Loud, Wide Makes a high pitch whine while running. I have used the light with this fan attached at several DJ gigs and have not had a noise complaint yet, but in a quiet room it is easily heard

Overall Review: Save your fingers and purchase a blade guard.

Pros: Powerful & Quiet

Cons: Quiet for a server room probably too load for an office.

Pros: Moves lots of air

Cons: Screws included seems to be too small. Standard fan screws that I had worked fine.

Overall Review: These things are loud, so dont get them if noise would be an issue. RPM's seem to range between 12k and 15k. Not the advertised 19k

Pros: May have issues with M/B RPM monitoring with this fan - shows up as 800 RPM on my asus M/B, at 13.5 V fan spins just shy of 20K RPM or as advertised.

Cons: Noisy - expensive.

Overall Review: None..