GELID Solutions Silent6 FN-SX06-38 60mm Case Fan

Pros: Just what the doctor ordered. Quiet and moves a lot of air.

Cons: None.

Pros: Very, very quiet. The 2 Seagates spinning in my ReadyNAS duo v1 are louder than this fan. It seems to move more air even though it's narrower than the stock fan (see Other thoughts). Great price, seems to be great quality (only time will tell), and looks nice.

Cons: None

Other Thoughts: I didn't look closely when I bought this and realized when I got it that it's narrower than stock. This fan is 15.5mm vs 25mm stock. It works way better though so I didn't take off an egg, besides it was my mistake. Not only is the NAS now quiet enough for my bedroom, the HDDs are also about 2C cooler, going from 41C to 39C idle after about 2 hours of uptime. AC set to 76F. The fan typically stays right around 1600rpm, so pretty much the same as stock, but it moves more air and is virtually silent. I definitely recommend it.

Pros: I have 3 of these in my case (Lanbox) to replace 4-pin molex fans, also 60cm. They keep my case as cool as 3 of the old fans, plus are half as loud as a single of the old fans. The 3-pin connecting to the motherboard gives me a view of the fans as they integrate with my diagnostic software, too (a purely geek desire).

Cons: The 3 pin fans require a y-splitter or two if you want more fans than spots your motherboard has for them.

Pros: Replaced 2 fans in a Startech backplane 5 in 3 cage.
This brought down the temp of the 5 hard drives from 34-39C down 5 degrees C to a more acceptable range for HDDs.

Cons: None.

Other Thoughts: I had to splice the 3 wires down to 2 to remove the yellow so I could use it in the backplane but works great now.

Pros: They seem to be somewhat quieter than the sleeve bearing fans that they replaced. Hopefully they'll also last longer - otherwise they wouldn't be worth the extra money.

Cons: Don't come with a 4 pin -> 3 pin adapter.

Other Thoughts: Make sure you have the necessary adapters to plug these in, if you're out of fan headers on your mainboard. Most of us have a bunch of those sitting around, so it's not that big of a deal (unless you don't). I installed 2 of these as case ventilation fans in a micro ATX HTPC case at the same time as I installed a new PSU (to replace one that had croaked). The whole setup now is noticeably quieter. I had previously used sleeve bearing fans, but have gotten kind of sick of having to replace them when they seize - which seems to be about every 3 months for a machine that runs 24/7. So the ultimate test will be long term, to see if they last more than 3 months.

Pros: Neweggs service, price and delivery. Quiet, decent amount of air.

Cons: None.

Other Thoughts: Bought 2 of these, they were used to cool 2 motherboard north bridge chipsets.

Pros: Silent

Cons: None

Other Thoughts: Used them as exhaust fans for a Powermac G4 MDD. Placed them behind heat sink. Fit perfect no need to remove heat sink.

Pros: I was building a small desktop case and needed some extra cooling. I needed a fan that would do the job and be really quiet since the unit will be sitting on my desk. This thing works great...it has dropped my CPU and Motherboard temps about 4-5 degrees Celsius each...also it is whisper quiet!

Cons: none as of yet

Other Thoughts: The specs say that this fan runs at 3200RPM. I have my BIOS set for "smart fan operation" and it has never risen above 3100. Not a big deal but I thought I would mention it. Also the fan blades are white so if you are going for an all black look might want to stay away.