Summary: Do your homework!!! Before you start out on what can be a very pleasant experience. Fans: call the manufacture or write to find out how the fan was meant to be run "horizontal" "vertical" Bearings will wear out ‘tout de suite’ if run in the improper position.
Summary: I have owned this heatsink since 2009, and have never had an issue with it. I originally bought this when the i7's first came out, and wanted to be sure to keep mine cool. I've not once had heat issues since I've owned this heatsink.
Summary: Given that the fan replacement is hard to find I would choose a manufacturer that has parts easily available. ****Updated from 1/10/16 - Wrote in to the Zalman website asking where I could buy parts and they sent me the malfunctioning heat sink fan from outta nowhere.
Pros: - Dropped temps to mid 30's - Pretty quiet - Easy Install - Blue LED
Cons: - Fan stopped working after 1.5 Years. - Replacement heat sink not easy to find.
Summary: I've been using this cooler for 5 years to keep my i5-750 running a stable 4GHz Overclock without fail. Under normal gaming conditions CPU will hover around 65c and usually around 40c when at idle or browsing internet.
Summary: Im a liquid cooler and nothings beats a waterblock., but untill my money gets better, its air for now.
Pros: I originally gave this a 2 stars because my fan started rattling after a year, today i opened the mail and there's a new fan, thankyou Zalman, i dont remember requesting it, maybe they read my review, so i am now well pleased, thanks again for making it right, even though i've owned it for 2 year...