Summary: Despite the very un-cool aspect (sorry for the pun) of putting a "stock" cooler on a $1K processor, this cooler is very capable and quiet. I put this on an i7-4860X (130 Watt), and with "BurnIn Test" running all cores at 100% for 10 minutes, no core got over 71C, with the average in the upper 60's. The fan never sounded like it was working hard. I'll be using it in other builds.
Summary: Sometimes simplicity is the best solution. After experimenting with a fancy and expensive water cooling solution that ultimately failed. I got this as a temporary solution. Hah! It works better than the water cooler ever did. Way, way better. I never expected comparatively small fan and heat sink to keep an i7-3930k cool. After all the water cooler struggled to keep it below 80c. Hah! My core temps never get above 60c now.
Summary: This fan/heatsink worked very well on my standard clocked 4820 CPU. I replaced it though when, during the summer, the ambient temp in the house began to rise to 26c and cpu temps began to rise to the 64c mark. One afternoon at 27c in the house, I ran prime95 as a test and shut the test down when the cpu hit 68c. I cleaned some dust off the fan blades, and the heat sink, and re-ran the test with the same result. The fan seems to have worked great for about 9 months.
Summary: I purchased this heatsink to replace a Corsair H80i which was taking up WAY too much space in an NZXT phantom case. I do not really overclock my CPU (Core i7 4930-K) as I feel it is powerful enough at the stock turbo speeds for my gaming needs. This actually allows my case to stay cooler overall than the massive H80i. For the price it cannot be beat if you are not overclocking at extreme levels.
Summary: I've been using this product by Intel with Intel Core i7-3930K Hexa-Core Processor 3.2 Ghz 12 MB Cache LGA 2011 - BX80619I73930K processors and so far had no problems with them, even where there's no air conditioner installed the temperature stays at 40-45 degrees celsius. Silent operation and well built.
Summary: This cooler worked just fine for a LGA2011 processor. Like other reviews the chip is bigger than the contact on the cooler. The plastic piece that protects the thermal compound came loose in shipping and some of the compound smeared which I believe is bad packaging on Intel's part. The fan makes little noise and the heatsink seems to do a decent job at cooling the chip. Pros Cheap Not noisy Easy to install Cools decently Nice little blue light when the computer is on.