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ZALMAN CNPS8900 Quiet 110mm Ultra Quiet Slim CPU Cooler

  • 1000 ~ 1500 rpm ± 10%
  • Fins: Aluminum / Base: Copper
  • Long Life Bearing
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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The slim ZALMAN CNPS8900 Quiet offers ultra-quiet cooling for low profile cases. An ultra quiet 110mm PWM fan, two Direct Touch heatpipes and aluminum fins combine to deliver efficient heat dissipation to keep your CPU and peripheral areas cool. Broad socket compatibility makes it suitable for almost all the mainstream motherboard platforms.

  • newegg Powerful cooling performance and quiet operation Two heatpipes and aluminum fins are designed for maximum cooling while switching noise free, down-blowing 110mm fan minimizes noise and cools not only the CPU but also provides powerful peripheral cooling. Moreover, the fan eliminates switching noise* for ultra quiet operation. (*switching noise is the high frequency harmonic noise that can result from voltage regulation).
  • newegg Direct Touch Heatpipe (DTH) Base DTH technology transfers the CPU’s heat directly to heatpipes, thereby minimizing heat resistance and maximizing cooling performance.
  • newegg Slim Profile The CPU cooler’s height is 60mm and designed to be installed in ATX cases as well as slim or LP (low profile) cases.
  • newegg Versatile Compatibility CNPS8900 Quiet accommodates a broad range of sockets including Intel LGA1155/1156/1366/775 and AMD FM1/AM3+/AM3/AM2+/AM2.
  • newegg High Performance Thermal Grease High performance super thermal grease ZM-STG2M maximizes heat transfer from the CPU to the base of CNPS8900 Quiet for intensified cooling performance.

Learn more about the Zalman Tech Co., Ltd CNPS8900 Quiet

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Zalman Tech Co., Ltd CNPS8900 Quiet

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  • David G.
  • 5/11/2015 11:41:50 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsgreat value

Pros: -Quietest CPU cooler I've ever used. Even under load.
-Cools about 15 degrees better than stock at Idle, and up to 30 under load.
-very high quality piece. the pictures are a little deceptive.
- lots of overhead clearance. should fit in nearly any case.

Cons: Just make sure you have room for that Ram if you have a 2 chip M-atx or Itx board.

Other Thoughts: - People that are complaining about noise. Inspect your cooler very carefully when you recieve it for shipping damage. And inspect it again after installation for installer damage. I have no doubt that 100% of these complaints are user error.
- I was a little worried about ordering this because it looks a little flimsy in the pics. It looks like it will bend if you look at it wrong. NOT the case.. the fins are much thicker and sturdier than anything I've used before.
Also, if you are worried about the gaps in the contact base.. don't. It's machined pretty well, and thermal compound will easily fill the gaps.

1 out of 1 people found this review helpful. Did you? Yes No

  • Dane G.
  • 1/4/2015 1:28:27 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsVERY quiet and efficient

Pros: Quiet
Easy to Install
Greatly cools CPU vs previous system
Fits nicely in Mid Tower

Cons: During install, fins are easy to bend (most coolers have this issue though)

Did you find this review helpful? Yes No

  • nicholas b.
  • 12/19/2014 8:44:22 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGreat value

Pros: -Great performance and very quiet (not silent).
-My CPU run 5 or 10 C cooler with this than with the coolermaster 212 evo it replaced. I cannot explain this... but its awesome.

-Great value
-low profile
-great build quality and looks... lovely

Cons: Minimum fan speed is too high (~1000 RPM) and makes an unpleasant tone at this speed. This heatsink performs so shockingly well the fan should run much slower or just shut off for low loads.

May interfere with tall memory heatsinks on ITX motherboards. I had to cut the tips off of one of my memory sticks- no big deal.

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  • Roberto d.
  • 12/15/2014 5:29:51 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsMine is noisy.

Pros: Cools CPU
Slim design, fits in Cooler Master Elite 130 Mini-ITX Case

Cons: I had the same problem as Robert L below. When I first booted the computer I heard a extremely loud rattle. I thought a cable was in the way of the fan so I quickly shut down the CPU and took a look. Nothing there, booted again, same noise. I pushed down on the fan thinking maybe it was loose and now the rattling noise is gone but it is still very noisy. I hear the rattle from time to time, during boot up period. I bought this fan for two reasons. Slim design and because it is supposed to be "Ultra Quiet". And after reading someone else having the same issue I am disappointed with the manufacturers quality assurance.

Other Thoughts: Had already submitted rebate before building the system. After rebate it would cost almost as much to ship it back for RMA as it would to just buy a new one. May just spend a little more and try the Cooler Master Seidon 120

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  • Anonymous
  • 12/3/2014 10:23:03 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggs

Pros: well built
cheap with MIR

Cons: very poor design
can't be installed on 1150 easily
conflicted with my memory

Other Thoughts: don't buy it

0 out of 2 people found this review helpful. Did you? Yes No

  • Robert S.
  • 12/3/2014 5:10:52 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsZALMAN CNPS8900 Quiet 110mm Ultra Quiet Slim CPU Cooler

Pros: 1) For the money it costs....solid choice!

2) Lower profile and installs so easy on my MSI G-45 FM2+ Mobo. (Big hands, big fingers, if I can do can you )

3) Keeps my AMD 7850k Kaveri nice and cool even at 4.2.

4) Looks great on my MSI G-45 gamer MB.

5) And hey, it looks good and it works well, and that is what counts :)

Cons: None

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  • Anthony D.
  • 11/28/2014 6:25:56 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsworks perfectly

Pros: ultra quiet and it works

Cons: might be slightly difficult to install, read the instructions carefully

0 out of 1 people found this review helpful. Did you? Yes No

  • Robert L.
  • 11/21/2014 5:24:09 AM
  • Tech Level: Somewhat Low
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsVery noisy but cools well

Pros: It cools pretty well, I haven't seen many cooling issues. The included thermal grease is pretty good

Cons: The thing makes a TON of noise! it rattles whenever it spins. I had to turn the RPM REALLY low to stop the rattling, but it still does rattle on occasion. The fan also covers one of my ram ports, which is a huge negative. Installing the little plastics clips on the bracket was very hard.

1 out of 3 people found this review helpful. Did you? Yes No

  • Matthew H.
  • 11/1/2014 2:16:11 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsHTPC champ

Pros: -Very quiet operation. Not totally silent but unless you're going fanless it doesn't get much better than this from my experience.

-Seems to cool effectively. I'm using this with a 65W AMD A10-7800 so this cooler is clearly overkill and I haven't had any need to monitor temps at all. I wanted something silent and since the HTPC would be slightly confined on a media shelf I also wanted something that would keep me from worrying about heat building up. After a marathon of activity there seems to be barely any heat coming form the case at all.

-Beautiful design. I've used Zalman coolers almost exclusively for my CPU needs for years. My first was a CNPS7000 way back almost 10 years ago and this cooler seems almost like a throw back to that design. I've always felt that it was one of their better looking ones.

-Low enough profile for very small cases. I'm using the tiny Silverstone MILO ML06B Mini-ITX case and this is just short enough to fit. It's NOT low enough to fit a slim slot load optical drive above it, in fact I had to remove the bracket which would normally allow for that option. I wasn't planning to install one however so it's not a big deal to me. The cooler sits almost perfectly below a fan grill on the top of the case allowing for great airflow.

Cons: -The U-shaped brackets which come with the cooler require it to be installed so that the heat pipes stick out in fixed directions. This can cause compatibility issues with certain motherboards/RAM. If additional brackets were packaged to allow the heatsink to be rotated 90 degrees it would open up a LOT of motherboards for better compatibility.

Other Thoughts: I selected this cooler based on a motherboard which I eventually discovered wasn't a good choice for my case. When I changed my motherboard selection I forgot to make sure this cooler would be compatible with that one as well. I now know that a GIGABYTE GA-F2A88XN-WIFI is NOT compatible with this. The U-shaped brackets which are needed to fit the cooler with the AM2+ socket require the cooler to be positioned so that the heat pipes bump into the RAM and a motherboard heatsink. I wanted to use this cooler though, so I machined some new brackets which would allow me to rotate it 90 degrees. Basically, they're nearly straight instead of U shaped, but still connect to same points on the cooler as the stock brackets. They work fine but it would have saved a few hours if Zalman made the brackets themselves.

I wouldn't recommend these kinds of modifications unless you have the proper machinery and know how. I only bring it up to show that Zalman could make this cooler compatible for more configurations if they create some of these brackets themselves.

Overall I'm very pleased with this cooler in my HTPC. The build includes the following:

SILVERSTONE MILO Series ML06B Mini-ITX - Fits with about half an inch between the top of the cooler and the grill on the top of this case.

GIGABYTE GA-F2A88XN-WIFI - this is NOT compatible with the cooler. I had to create new parts to make it work.

AMD Radeon Gamer Series 16GB DDR3 2133 - this RAM is proof that giant heatsinks in high end memory are generally a gimmick. It performs wonderfully and sits cleanly under the edge of this Zalman cooler as long as one of the heat pipe sides isn't bumping into it.

SILVERSTONE ST45SF-G 450W SFX12V - this is a little bit quieter than the Zalman cooler, both are very quiet.

SAMSUNG 840 Pro SSD 256GB - no noise, basically no heat, and boots to XBMC in about 15 seconds. no complaints whatsoever.

2 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 8/18/2014 11:50:52 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week

5 out of 5 eggsOne of the better options for an HTPC.

Pros: I am using this in a Silverstone GD06 with an MSI X58M. I have no issues clearing RAM. In what is a fairly cramped case I have fit the following previously:

Zalman CNPS8000B (92mm)
Scythe SCSK-1100 Shuriken Rev. B3 (100mm)
Scythe SCBSK-2100 BIG Shuriken 2 Rev. B (120mm)
Asetek 545LC (90mm all-in-one kit, required case modification).

The Zalman CNPS8900 gives me about 1cm of clearance under my BD Drive. The Zalman CNPS8000B gave more clearance but it had the noise levels of a turboprop.

I am seeing 10-15c improvement over stock under load for an i7-965 using Antec Formula 7 (my tube of Arctic Silver 5 went AWOL). I have fitted Enermax T.B. Silence case fans (15dBa) and this cooler is not audible over them under load. The loudest fans in the case are my two GTX760s under load.

The cooler is extremely easy to assemble. The manual could be reduced to a single page; looking at the pictures is more than sufficient. Anyone with difficulty installing this likely did not measure out available space properly before trying to slap it on an MITX, or is just flat out incompetent in life (and erroneously gave themselves "5" for Tech Knowledge).

Cons: Captive thumb screws would work much better and remove the need for a screwdriver, but this is not worth an egg deduction. It takes real effort to misalign the screws.

The fan cable ending in a mini 4-pin makes no sense. There is an adapter cable terminating in a 4-pin PWM fan connector which is unnecessary, but this is not worth an egg deduction.

The first package I opened had a dead fan motor. I've had some incidents in the past with dodgy fans from Zalman, but this was remedied by a quick exchange. Still not worth an egg deduction.

Cooler uses a proprietary, non-replaceable 110mm fan. Not that big a deal.

Other Thoughts: This is probably the best low profile heatsink that can fit into an HTPC case short of the Noctua NH-L12 (which has clearance issues due to its width). I am seeing minimal difference between this and the Asetek 545LC, which admittedly is an inferior watercooling solution. Considering the cramped dimensions, airflow issues, and high heat given off by an i7-965, it performs admirably; even better than the Scythes I used previously.

Relevant specs:

Silverstone GD06 HTPC case
MSI X58M LGA1366 motherboard
Mushkin Enhanced Blackline RAM (all 6 slots used on mobo)
Enermax TB SILENCE fans (3x120, 2x80mm, 1x90mm)

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