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Arctic Announces the Freezer 33 Series Semi-Passive CPU Coolers

btarunr

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ARCTIC announces its new Freezer 33 Series. The high-performance semi passive CPU coolers Freezer 33 and Freezer 33 CO are the successor models of the Freezer 32 series. They are equipped with PWM controlled 120 mm cooling fans and offset heat pipes to ensure optimal heat dissipation. The low footprint of the Freezer 33 avoids interference with the RAM, even if there are two fans used. Fast and easy to install and extremely reliable, the mounting system is compatible with Intel and the new AMD Ryzen AM4 socket.

Semi passive cooling makes the Freezer 33 Series very efficient and extra quiet. During simple applications, such as creating documents, the CPU is cooled passively. The F12 PWM fan only powers up at a higher load, starting at 40 % PWM. In this way, an optimal cooling capacity at a low noise level is guaranteed. The Freezer 33 CO is specifically designed for continuous operation. The Japanese dual ball bearing, used in the "CO" version, reduces rotational friction considerably, is significantly less sensitive to dust and high temperature and hence up to 5 times more durable than other bearings.



Main Features Freezer 33 Series
  • Compatible with Intel Sockets & AMD Ryzen (AM4)
  • Passive Operation up to 40 % PWM
  • Offset heat pipes ensure optimal heat dissipation
  • Improved fan controller made in Germany
  • Anti-vibration rubbers for quiet operation
  • Installation in all four directions possible
  • Transport-proof mounting with backplate
  • MX-4 thermal paste included
The Freezer 33 and Freezer 33 CO are available in the ARCTIC-Webshop starting at a price of USD 45.99 MSRP as well as on Amazon.

View at TechPowerUp Main Site
 
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Last Saturday I bought Arctic Freezer 33 Plus cooler that appears to be the same as Arctic Freezer 33, but with additional fan. Installed it at Ryzen 1700 on Asrock X370 Taichi mobo. First impressions on the cooler are mixed.

The temperature is @ ~ 60°C in full load in Prime 95 at stock frequences, which I assume to be a good result. But what dissapoints me is the semi-passive mode that doesn't work for me, i.e. fans are always working, even when PC is idle. No need to say, the noise level is above my expectations.

Guys, maybe I'm doing something wrong?
 
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...But what dissapoints me is the semi-passive mode that doesn't work for me, i.e. fans are always working, even when PC is idle. No need to say, the noise level is above my expectations.
Guys, maybe I'm doing something wrong?
This isn't really the place to ask for help, but have you got it plugged on to a 4 pin PWM header?
Are the fans exactly the same, and listed as 0Db start?
 
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Processor AMD Ryzen 7 1700 @ stock
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This isn't really the place to ask for help, but have you got it plugged on to a 4 pin PWM header?
Are the fans exactly the same, and listed as 0Db start?

Sorry, I guess, I should go and ask at the specific forum, if someone with previous models of these fans have encountered the same problem.

I've done as it is said in the manual, plugged one fan into another, and the second to 4 pin connector.

The label on the fans says 'Arctic Freezer 33 Plus ', and the booklet from the box confirmed that this cooler features semi-passive mode.
 
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I was wondering why no CPU coolers are designed the same way as graphic card coolers. 0 RPM on desktop at low loads and fan operation during higher loads.
 

NBH

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Interesting idea but a good quality fan spinning at 300-400rpm when the PC is idle is practically silent and is still providing some airflow.
 
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i had one a while back.. the fan never really stopped spinning.. noise wasnt a problem the fans did slow right down but the semi passive factor didnt seem to make much difference..

i would like all my fans to switch off whilst browsing and the like.. not because of noise it would just help keep the dust out..

my cpu fan spins at around 300 rpm.. as slow as i can make it go.. my asus motherboard kept thinking it was faulty and sending me into the bios to put it right.. a pain in the arse every time you boot.. the only way to stop it was to disable the cpu fan monitoring.. :)

trog
 

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Last Saturday I bought Arctic Freezer 33 Plus cooler that appears to be the same as Arctic Freezer 33, but with additional fan. Installed it at Ryzen 1700 on Asrock X370 Taichi mobo. First impressions on the cooler are mixed.

The temperature is @ ~ 60°C in full load in Prime 95 at stock frequences, which I assume to be a good result. But what dissapoints me is the semi-passive mode that doesn't work for me, i.e. fans are always working, even when PC is idle. No need to say, the noise level is above my expectations.

Guys, maybe I'm doing something wrong?
Maybe you need to let the BIOS/UEFI control the fan? There may be multiple fan control profiles and you need to pick the right one?
 
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I was wondering why no CPU coolers are designed the same way as graphic card coolers. 0 RPM on desktop at low loads and fan operation during higher loads.

Most PWM fans are, but you need to lower the voltage as well.
 
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They aren't designed that way. It would require a thermal diode in the base of the cooler with controller that only kicks in when temperature of heatsink at the CPU becomes hotter. They currently entirely rely on fan control from motherboard, making it basically impossible to achieve that. It should really just use power supply and monitoring of motherboard, but would be fully autonomous.
 
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Maybe you need to let the BIOS/UEFI control the fan? There may be multiple fan control profiles and you need to pick the right one?

Thanks, that really helped. I found fan calibration profile deep inside the UEFI options, and now CPU fans are at low rpm when T < 40C.:rockout:

Although, I guess, it is more the option of the mobo than the fans.

Nonetheless, thanks everyone for advices, and sorry for turning original post discussion into help section.
 
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