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Alphacool Eisbaer 420 CPU - black

> 5 ready for shipment, delivery time 1-3 days

£117.96 *

Prices incl. VAT plus shipping costs

With the Eisbaer, Alphacool is revolutionising the AIO cooler market. Classic AIO CPU coolers... more
Product Information

With the Eisbaer, Alphacool is revolutionising the AIO cooler market. Classic AIO CPU coolers are disposable products that can’t be expanded or refilled. The Alphacool Eisbaer is built modularly and can be expanded, modified, or refilled at any time. That means the Eisbaer is not just an AIO, but is completely based on classic water cooling components. It’s quieter and more powerful than the average AIO solution.

The individual components

Alphacool uses a radiator made of pure copper. The basis of the radiator is the popular Alphacool NexXxos series, which is globally renowned. The pure copper design increases the cooling performance enormously compared to the usual aluminium radiators found in classic AIOs. The thin fin thickness ensures impressive cooling performance with fans that have low RPMs. The Eisbaer’s performance also drops much slower when the fan power is lowered than radiators with higher fin thickness.

Flexible PVC tubes make installing the Eisbaer easy. The tubing is easy to lay and get into the right position. Both tubes have anti-kink springs to prevent them from bending and cutting off the flow of water. Their 11/8mm size is also a standard in the water cooling field, and is a common size alongside the 13/10 and 16/10.

Quick Connectors
The Eisbaer was developed with expandability in mind. That’s why you’ll find a quick connector on one of the tubes. This quick connector is compatible with Alphacool HF Quick Connectors, making it easy to expand the cooling loop with a radiator and graphics card cooler.

The Eiswind fans were specially designed for use in radiators and provide very high static pressure to force cool air through the radiator’s cooling fins. Both fans can be regulated via PWM over an enormous range of 550 to 1700 RPM. A PWM Y-adapter is included with the Eisbaer LT, so both fans can be connected to a PWM connection on your motherboard or a separate fan controller.

All connectors are based on the classic G1/4 inch threads, which are standard in the water cooling field. That means all the components can be switched out at any time if desired. So if you decide later that you’d rather have thicker tubing or even HardTubes, you can easily customise your system.

All these features make the Eisbaer cooler something really unique. Its high-quality aesthetic with an illuminated logo and reservoir – which is also where the pump is found – gives the inside of any PC a new shine. The soft-touch surface of the pump casing is another optical highlight. 
With the Eisbaer, you get an all-around perfect product that is not only extremely powerful but can also run near-silently.  

The basis of the pump is the Alphacool DC-LT Ceramic Ultra Low Noise pump, which is also available separately. The pump runs extremely quietly and can be regulated between 7 to 12V. You can also control the pump via your motherboard. If the Eisbaer is running on its own, running the pump at 7V won’t lower performance at all, as proven in many tests. The insulated pump casing reduces the noise generated and also almost entirely absorbs vibrations. 
The smooth and glossy polished copper bottom of the cooler ensures optimal heat absorption and quickly and efficiently transfers heat to the water via the fine cross slot structure of the cooler.

Technical Details

Pump (Alphacool DC-LT 2600 Ultra low noise Ceramic)

  • Speed: 2600 RPM
  • Voltage: 7-13.5V DC
  • Power consumption: 4W
  • Maximum flow rate: 70L/h
  • Maximum head: 0.85m
  • hoses length: 32 cm


  • Eiswind 2
  • Bearing: Sleeve Bearing
  • Voltage: 12V
  • Power connector: 4-Pin PWM
  • Rated speed (rpm): 550 -1700 (+/-10%)
  • Fan efficiency: 63,85 cfm / 108m³/h
  • Air pressure: 1,66 mm H2O
  • Volume: 29 dB(A)

Scope of Delivery

  • 1x Alphacool Eisbaer 420 CPU - Black
  • 3x bequiet! Pure Wings 2
  • 1x Intel Backplate
  • 1x Intel bracket
  • 1x AMD bracket
  • PWM Adapter
  • Mounting material
  • 1x Thermal paste

Compatibility Intel: 775 / 1056 / 1155 / 1150 / 1151 / 1200 / 2011 / 2011-3 / 2066
Compatibility AMD: AM2 / AM2+ / AM3 / AM3+ / FM1 / FM2 / FM2+ / AM4


AM4 Mounting

Notice for expansion
Please take care not to mix up the IN and OUT ports. On the “Eisbaer”, the “outlet” is marked in “red” and the “inlet” in “blue”. On the components to be connected, it is the opposite. The coupling with the “blue” marking denotes the “outlet” and the coupling with the “red” marking is the “inlet”. This is important as in many coolers the flow direction is crucial for optimal cooling performance.

Attention: The manufacturer Mayhems advises that Mayhems fluids, especially the Aurora line of products, have been manufactured and distributed solely for show and modding purposes. These should not be utilized in the system for more than 14 days.

We would also like to advise that Mayhems fluids can damage water cooling products, and using Mayhems fluids can thereby void the warranties offered by the following manufacturers: Koolance, Phobya, Alphacool, Aqua Computer, Watercool.

Damages such as: clogging, corrosion of aluminium radiators, deterioration of glued containers, etc., are a consequence of the use of Mayhems, but will not be reimbursed by Mayhems. Use is therefore at one’s own risk.

Awards and documents
Technische Details und Videos... mehr
Technical details
Manufacturer: Alphacool
Prefilled: Yes
Radiator Thickness: 30mm
CPU Performance: Excellent
Hose dimensions: 11/8mm
Radiator size: 3x140mm
Socket: AMD AM4, AMD AM3(+)/AM3/AM2(+)/AM2/939/FM2(+)/FM2/FM1/G34/940, Intel 2066, Intel 1151/1150/1155/1156/755/2011-3/2011/1366, Intel LGA 1200
Radiator Dimension: 459 x 144 x 30
Questions & Answers more
Questions & Answers
Frage von Trevor C. vom 08. August 2017
Is there a warranty? If so what are the details?
Antwort von Administrator vom 08. August 2017
Warrenty is 3 years.
Frage von John Hewitt vom 09. September 2017
Does this kit come with the am4 Bracket ?
Antwort von Administrator vom 09. September 2017
Yes, the AM4 bracket is included.
Antwort von John Hewitt vom 09. September 2017
It says in description that you need to buy the am4 bracket separately
Frage von Evan M. vom 12. December 2017
I would like to extend the length of the tubes for a build in a large case. This is my first build using a custom or semi-custom loop. What are the dimensions of the cables I should be looking for? I know I need some that are over 320mm long. This build is for the Thermaltake P5 case.
Antwort von Administrator vom 12. December 2017
The tubes are 32cm long. If you need longer tubes, maybe it is better to buy the Eisbaer Solo. Than you can use any tube lengh and any radiator you want.
5 Question (s) in other languages.
Click here to display this question (s).
Frage von VICTOR C. vom 09. September 2017
Hola, este kit Eisbaer 420 viene con el adaptador para AM4 Ryzen incluido ? o hay que comprarlo aparte ?
Antwort von Administrator vom 09. September 2017
Il supporto AM4 è incluso qui
Frage von Romeu R. vom 09. September 2017
I need to extend the length of the tubes, can I disconnect the tube that does *not* have the quick connector? So I can replace it with a longer tube?
Antwort von Administrator vom 09. September 2017
Sure you can, all parts from the Eisbaere are normal Custom watercooling parts.
Frage von Guest #284651 vom 10. October 2017
Die Anschlüsse Fon Radiator und CPU Block sind die auch mit Hardtubes kompatibel?
Antwort von Administrator vom 10. October 2017
Die Anschlüsse müssen gegen spezielle HardTube Anschlüsse getauscht werden. Die verbauten Anschlüsse sind ausschließlich zu Schläuchen im Format 11/8mm kompatibel.
Frage von Guest #297435 vom 01. January 2018
Hallo wie sind die Maße von dem Radiator ?
Antwort von Administrator vom 01. January 2018
Die Maße des Radiators sind: (LxBxH): 489 x 144 x 30 mm
Frage von Guest #298632 vom 03. March 2018
Kann ich die Pumpe abklemmen und dafür eine externe in den Kreislauf integrieren?
Antwort von Administrator vom 03. March 2018
Das kann man machen. Allerdings macht es mehr Sinn, die Pumpe einfach mitlaufen zu lassen.
Antwort von Guest #298632 vom 03. March 2018
Also macht es die Pumpe im Eisbaer nicht kaputt wenn die externe Pumpe mehr Fördervolumen hat?
Read, write and discuss reviews... more
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28 Nov 2017

Incredible performance for a fair price

I bought the “Eisbaer” to replace my old Corsair H80I (1V). Because of my limited space in the office I have to place my Computer under the desk which drastically heats it up. Even though I used 4x 140mm axial fans, my Pc crashed after several hours of games like “Battlefield 1” or “Witcher 3”. Sometimes as far as getting a bluescreen! Now that I bought the Eisbaer those times are over. According to Software idle my temperature sank from 50°C to 37°C! Installing the device wasn’t a problem at all thanks to the well written instructions. Everything you need is included and even the reservoir is pre-filled. That means you can immediately start doing stuff once the technical part is done. Another argument that speaks for the Eisbaer is it’s easy extensibility with most of the other Alphacool articles. If you want to upgrade your cooling device you don’t have to buy a new one. You can find everything you need in the Aquatuning shop, for a fair price aswell! Another stellar thing would be the Support. One of the fans was a little broken after some time and they sent me a new one without any complains. I got my replacement within 3 days! All in all I am very happy with my purchase and would recommend this cooler to basically anyone who needs one.

2 evaluation(s) in other languages.
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