Summary: I purchased this in 4/2014 and wasn't going to write a review, but I just had another questionable build quality Zalman arrive today. It is a different model (CNPS8900) so now I am 0 for 2 with Zalman.
Pros: Benchmarks were really good for this on Toms Hardware. It really is a great cooler.
Cons: The cooler arrived with the fan brushing against the rear fins. I had to try to bend the fan forward a bit to keep clearance.
Summary: i gave it a 3 and not a 2 because the cpu runs really cool with it.
Pros: the cpu runs very cool even with the included thermal grease
Cons: it is actually quite weird to work with it. it was very unconfortable to install on the board and i couldn't even find a way to install it with the back plate. Also i noticed that i did not get one pack of screws
Excellent cooling until it hummed/buzzed 3 days later
Ryan K., Newegg
13 November 2014
Summary: other than that minor issue that is being RMA'd for, its a pretty solid heatsink for being an air selection over water cooling.
Pros: Excellent cooling area, quiet(until 3 days later). Clocking the i7 4790k to 4.7 Ghz and running games, kept it down around 40-50C. Very exponential cooling power. Controllable speed
Cons: This may just be a defunct cooler out of the whole lot. after 3 days, a buzz noise between 1400 rpm and 1600 rpm emitted. Since the fan constantly is running around this area, its rather quite annoying. Sounds like a bad bearing or vibration vibrating something on the fan,. sounds RPM dependent(p...
Summary: This cooler is a very nice cooler, and functions very well as expected. My biggest issue with the Zalman CNPS9900 was the difficulty of the install. A LOT of pressure had to be used in order to secure it down to the bracket behind.
Works well, a huge, borderline intolerable pain to install
Shari Youngblood, Amazon
23 September 2014
Summary: The good: it works very well. Cools my CPU (AMD Phenom II 955) very well, never goes above 50C even with all 4 cores under full load and you can't really hear it (compared to the other 3 fans on my case). No problem there.
Summary: Why would they take away a perfectly good clip mechanism? I purchased this heatsink for that very reason, but now i will probably be returning it since i'm not willing to completely disassemble my computer.
Pros: I've had one of these for years. They are quiet and effective.
Cons: These newer versions don't have the same clip mechanism and the old. The older ones had a simple clip mechansm for AM- based mainboards, easy to install and uninstall directly on the top of the mainboard- no backplate required. But the new version has an overly wide nut in the middle of the base ...
Summary: Other then the ticking sound coming from the fan this would have been a five star product. Perhaps it is just the fan that I received, and perhaps, just hopefully the ticking sound will go away in time. But because of this ticking sound I would hesitate to purchase another Zalman product.
Pros: good heat dissipation high quality parts except for the fan (more on that) sturdy
Cons: As the title points out, my biggest disappointed with this cooler is the fan. There is a distinct and very noticeable ticking sound coming from the fan. This is very annoying considering I specifically wanted a silent running computer so even at SLOW speeds you can hear the fan ticking. I would r...
Summary: Design flaw. AM3+ bracket could have been lowered or they could include longer screws to reach the inserts. Shouldn't have to bend things to get it to fit. Almost felt like I was going to break my motherboard or CPU installing it.
Pros: Does it's job and keeps CPU cool. Like the design. And it is quiet.
Cons: Very frustrating install for AM3+ motherboard. The screws are not long enough so you will need pliers and bend the brackets down.