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ARCTIC COOLING Freezer 33 CO 120mm Dual Ball Dynamic Bearing Semi Passive Tower CPU Cooler

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  • 0 - 1,350 RPM (controlled by PWM)
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ARCTIC Freezer 33 CO Tower CPU Cooler

Powerful Cooling Capacity with Semi-Passive Fan Design

Compatible with the latest AMD AM4 socket and most Intel sockets, the ARCTIC Freezer 33 CO tower CPU cooler is a great choice for your new build or system upgrade. With four 6mm diameter direct-touch heatpipes, 49 perfectly spaced aluminum fins and a quiet 120mm PWM fan, this model keeps your powerhouse running cool even when you're pushing it hard. The fan features semi-passive design that stops at idle or low load, and its Japanese ball bearing guarantees ultra low noise and ultra long lifespan.

Price-Performance Champ

The Freezer 33 CO is based on the ARCTIC Freezer i32 CO, but features several improvements that boost performance and further reduce noise. Thanks to the award winning cooling performance, the Freezer 33 CO is the perfect gadget for PC enthusiasts looking for an affordable solution for the CPU cooling.

General information

General information

Enhanced Bearing for Continuous Operation

"CO" stands for Continuous Operation and makes the cooler suitable for PCs with non-stop operation like servers. The Japanese dual ball bearing used in the "CO" fan reduces rotational friction considerably, is significantly less sensitive to dust and high temperature and hence up to 5 times more durable than other bearings.

Semi Passive Cooling

The sophisticated fan controller that was developed by German engineers allows passive cooling of the CPU during simple applications such as surfing and creating documents. The F12 PWM fan only starts up at a PWM signal with 40 % pulse width. This saves energy, extends the service life and makes the cooler at low load completely silent.

General information

Improved Heat Dissipation

The Freezer 33 CO has off-centered heat pipes that dispense the heat in a more efficient way than the centered ones of its predecessors. Also, the layout of the 49 aluminum fins creates micro vortices that boost the airflow and circulate it around the heatpipes.

General information

Optimal Compatibility

Fast and easy to install and extremely reliable, the mounting system is compatible with Intel and AMD sockets. Also, the low footprint of the Freezer 33 CO avoids interference with the RAM, even if there are two fans used ensuring the best compatibility.

General information

Easy Installation & Safe Transportation

Thanks to different mounting models for various sockets, a backplate and a significantly lower weight compared to the i30, the Freezer 33 CO is not only fool-proof to install, but also absolutely transport safe.

This model supports AMD AM4, and Intel LGA 1151, 1150, 1155, 1156, 2011-v3** and 2011** socket types.

* The AM4 backplate comes with your motherboard.
** Square ILM (80 x 80 mm spacing) only

General information


Learn more about the ARCTIC COOLING ACFRE00031A

Warranty, Returns, And Additional Information
Ownership: 1 month to 1 year
Verified Owner
4/ 5
Pretty good.

Pros: • Relatively easy install
• Arctic fans come with a female fan plug so you can chain fans together to plug into one header
• Keeps my shiny new Ryzen 2600x nice and cool under pressure

Cons: • Anti-vibration pads for the fan did not want to separate from their "perforated" square, ended up just cutting the thing into smaller squares and sticking them on the fan
• Only came with 3 of the 4 #6-32x20mm screws required to install the fan on AM4 - had to run to Home Depot to find a compatible screw mid-build and then (carefully) screw it down the same distance as the others. Definitely docking an egg for that.

Other Thoughts: • Provided you get all the screws that come with the cooler for your socket, it's a great little cooler that seems to be doing better than my old Hyper 212 Plus on my previous i5 3570k.

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Ownership: 1 month to 1 year
Verified Owner
4/ 5
Great Cooler!

Pros: Semi-passive so it hardly ever has to run the fan keeping the system very quiet. Great value for the price. Easier to install than most coolers of the same size.

Cons: A little difficult to install. I followed a instructional video I found on-line and still had some problems orienting brackets correctly. Brackets that hold the fan are a little bit flimsy.

Other Thoughts: Definitely would recommend this cooler.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Great AM4 Cooler!!!

Pros: - the included fan works very well
- product feels very solid
- mounts onto stock AM4 backplate for quick installation
- includes sufficient amount of good quality compound for the first installation
- have it set so the fan only comes on if the cpu temp reaches 45C so its mostly quiet during non gaming tasks

Cons: - no paper manual so you have to go online and get one (not a big issue for me but this could affect some people).
- the rubber spacers you need to install for a push fan config are though to separate from the sheet by hand. (not a big issue for me, just cut them out with scissors).

Other Thoughts: - on an AM4 config, make sure you compare the screws you removed from the board to make sure they have the same gauge and thread as the ones that come with the cooler because they are all in one baggie and some of the intel screws look the same.
- you need to play around with your board controllers fan settings and temperature thresholds to make sure the fan doesnt blow 247

1 out of 1 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Very solid 4-point mounting for 1151

Pros: - has a very simple and solid mount system for 1151
- easy to screw on, screws not hidden or impossible to reach, and not junky plastic push pins
- comes with small packet of honestly very good quality heat sink paste
- can be mounted pointing any direction
- sides of heat fins bend down to form closed sides, so fan can be mounted to suck instead of blow and still draw through
- fan stays off most of the time, must have bios set to keep fan below 40% at normal low temps to stay off

Cons: - really none
- warning, need access to back of board for install, but worth it for super solid and simple mount

Other Thoughts: This seems like a pretty good cooler as far as they go. I got it because it was on sale, and got all the details right for my requirements, which includes packing my computer around a lot, so a totally solid mount is mandatory.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Fantastic budget cooler

Pros: Minimal packaging.
Simple and effective design.
Mounts up for use well.
Great quality.
Excellent fan.

Cons: No instructions included.
Can only be installed a certain way with Ryzen.

Other Thoughts: Not the best cooler on the market, but one of the best 'bang for the buck' coolers you can buy.

I like this cooler more than my hyper 212 evo

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Works great, easy to install.

Pros: Quiet, Cool, Has everything needed for AM4 out of the box. Fits well.

Cons: Lacked physical paper instructions (you need to visit the link on the paper card included in the box).

Other Thoughts: Ordered this to go with my Ryzen 7 1700x. Installed easy, followed the instructions. Keeps the cpu cool, for the most part it is set at 25% and my processor is running at 20 degrees Celsius. No overlock yet. Fits nicely on my MSI x370 gaming pro carbon, lots of room for ram installation.

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Ownership: 1 week to 1 month
Verified Owner
3/ 5
Very Quiet and effectively cools the CPU, comes with extra and unexplained parts

Pros: The cooler is very effective and quiet, especially when compared to the CPU cooler in my previous computer (CoolerMaster V8 CPU cooler). It did come with a package of Arctic Cooling MX-4 thermal paste. All and all, I am satisfied with this cooler's performance.

Cons: First con is was also a positive and that is thermal paste is included; this was not mentioned in the sales literature or manual on the manufacturer's website. As a result, I purchased a tube of Arctic Cooling MX-4 thermal paste which was not used and was not returnable since it would have cost almost as much to return the thermal paste as it cost.
The second con is the extra parts that were included with the cooler with no explanation of usage. There were several foam pads included that did not show any usage with either Intel or AMD processors; the manual listed them as parts but then never explained how to use them. Finally assembled without the padding.
The third con is the brackets that mount the fan are pretty flimsy. There could have used a higher gauge wire. I did not permanently bend them during installation but they did bend.
The final con is that I have yet to see the cooling fan do passive cooling. The fan starts on startup and continues to run at a low speed. But given it low noise level I am not too concerned at this point.

Other Thoughts: Yes, I would recommend this cooler to other people.

2 out of 3 people found this review helpful. Did you?
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