Summary: I'm reviewing this mostly as a warning - Zalman says this is AM3+ compatible, which it is technically speaking, but they don't include the AM3+ brackets. To get those, you need to go to their website and place an RMA for them, specifying you didn't receive them. I ordered them, but I haven't installed the cooler yet, as the cooler included with my CPU is working fine, and it's a bit of a PITA to install.
Summary: This fan kick my ass so good, I literally had blood on the blades. Took me 45mins to get it on the ASUS p8z77 mob and I struggle so hard to get it on with limited instructions; scrape my bank hand so many times, blood got on the fins. Once it is on, CPU is good, but installation is difficult.
Pros: Very rectangular shaped heatsink. I like how it has clips for both sides provided (unlike some other brands that work with two fans but only give you one clip and somehow you need to find another clip!). I use the fan resistor and that keeps it much quieter (I am picky with silence so I will mention it is a little louder than my 4 Cougar case fans :) ), and it still maintains the same temp (around 46C no load with FX-8150). It has a very smooth and flat copper bottom ...
Cons: It blocks a RAM slot on a very well RAM spaced motherboard. And yes, I have the shorter side of the heatsink facing the RAM and the longer end facing the back of the case. I expected this when getting a larger heatsink, and AMD RAM runs in dual channel mode only, so I moved both of the RAM sticks to slot 2 and 4 from 1 and 3 and they still function perfectly. I mean, dual sticks come well priced up to 16gb which about the max you really need. unless you are filling al...
Summary: This cooler replaced another popular product which I thought worked pretty well. The Zalman gives me temps at idle that are 2-3 degrees cooler, but wait there's more! Temps while running Prime95 or World Computing Grid projects are 7-9 degrees cooler. With my system overclocked temps are at least 5 degrees cooler as well. I can run Prime95 with my i7-860 system overclocked to 3.5Ghz and temps are below 60 degrees Centigrade.
Summary: This is a nice CPU cooler for my Core i7-3820 in a 2011 package. I am not overclocking or anything like that, but I've been running for 30 days straight with no problems. It's a very large cooler, though. I was worried that it would have some physical interference with something on the motherboard...but it didn't. Works good. Fan is pretty quiet.
Summary: It may well be worthy of 5 stars but I haven't powered it up yet. I thought that this info is important to get out ASAP for the benefit of other prospective buyers. I disagree with others here on two accounts. First, I see no problem with the quality of the fan mounting, unless you have the Mercedes mentality (if an ounce is good, a ton must be better). The fan is held securely by Zalman's method, and from this quality professional's point of view should give no trouble.