Summary: I combined this with the air duct to keep the processor nice and cool. Works great so far. The fan is loud but not louder than any other server you would find in an enterprise-level environment.
Pros: Cools extremely hot Xeon processors very efficiently.
Cons: Warning! Make sure you set the fan speed in your BIOS because out-of-the-box they didn't run at a fast enough RPM to cool my processors causing it to shutdown. Once I enabled "high performance" in BIOS those heat sinks kept everything cool.
Pros: High quality, very solid, compact, mounts easily. Literally no bigger than the heat sink mount for the processor, so no issues clearing nearby memory.
Cons: Can be loud at high RPM, fan isn't removable without removing the entire unit from the CPU. When dust collects between the fan and the fins, you have to blow it out with compressed air or pick it out with a small wire. If the fan was removable, it could easily be cleaned. Not a huge deal, since I've only had to do it once in 3 years.
Summary: I have two of these on an 1nte1 S5520SCR motherboard. One CPU (E5620) was running up to 20 deg C hotter than the other. When I took them off, I found one had a warped baseplate that prevented it from fully contacting the CPU. This was the hot one. Also, these emit a high pitch squeal when operated at 100 pct fan speed. These have very powerful (1.2 amp) fans that spin at high RPM.
Summary: And for a laugh, run one of these coolers at 100%. They make a very loud and high-pitched whine at full speed. At low RPM they are quiet. By Loud, I mean bring hearing protection.
Pros: Intel brand, low profile, 4-pin, LGA1366 M3 THD Xeon. These are threaded for true Xeon mobos. They do not come with sub-plates for mounting, and don't need one on Intel Xeon motherboards. They are fitted for the factory Intel cases and mobos, not aftermarket.
Cons: I bought two of the these for an Intel S5520SCR motherboard and E5620 (80w) chips. One of them ran up to 22 deg C hotter than the other, and could hit 95 deg C when stressed hard. Then something unrelated went wrong the mobo, so I RMA'd and when I pulled the heatsinks, I found the reason for the temp difference. One of the heatsinks was only making contact on one side of the chip (looking at TIM mark). Then I looked at it. The copper pad was lower than the stainless p...
Summary: If you're building a server to be used in your house, this is not the one to buy. It definitely has a higher pitched sound than other fans. The sound is very noticeable at idle and if you're doing some heavy work, just think what a dell rack server sounds like. Buy the Noctua heatsink and fan instead. I can't even tell it's on and I have it on the highest rpm.