Alphacool Eisbaer 240 CPU AIO Cooler Review

The Alphacool Eisbaer series of AIO CPU coolers are one of the units that spearheaded the non-sealed liquid cooling systems that are becoming popular. This means adding coolant and expanded the loop if you need to. Alphacool has configured its kit in a very smart way as well that will make sense to enthusiasts.


Alphacool Eisbaer

The Eisbaer series AIO is Alphacool’s high-end cooler and it comes in a variety of sizes. You can get the Eisbaer with radiators sized from 120mm all the way up to 280mm. It’s pretty safe to say there is a size to fill your needs no matter what that is. Today’s unit is the 240mm version with two 120mm fans. As you’ll see in a minute the somewhat unique feature Alphacool brings to the Eisbaer is its upgradeability. The Eisbaer comes with a quick disconnect on one of the tubes that will allow you to expand the loop. Alphacool doesn’t currently sell a GPU block yet but has teased the upcoming Alphacool GPX-Pro. That’s fine for now as we should first determine how strong this AIO is before worrying about expanding it.

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Package & Specs

Alphacool packages the Eisbaer 240 AIO using the industry standard formed cardboard. It isn’t as svelte as Arctic Cooling’s method but it works well and everything arrived safely.

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Dimensions: (L) 120mm(W) 49mm x (H) 155mm

Material: Aluminum radiator with copper water block



  • LGA 2011
  • LGA 1366
  • LGA 115X
  • AMD

  • AM2
  • AM2+
  • AM3
  • AM3+
  • FM1
  • FM2
  • Fan:

  • Size: 120mm x 25mm
  • Speed: 550-1700 RPM
  • Air Flow: 63.85 CFM
  • Noise: 29 dBA
  • Contents

    Alphacool includes two fans with the Eisbaer 240 but packages enough screws to mount four fans in total though only two are included. It’s your basic assortment of screw and backplates.

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    Here are some shots of the radiator and heat exchanger for various angles. The "brown" you see in the radiator is not an optical illusion. These radiators are made from copper.

    Alphacool depends on a radiator made of pure copper. The base of the radiator is the popular Alphacool NexXxoS series, which is well-loved around the world. The pure copper construction raises the cooling performance enormously compared to the usual aluminium radiators used in classic AIOs. The slight thickness of the fins ensures enormous cooling power in fans with low rotational speed. This ensures that the performance of the "Eisbaer" when adjusting the fans down decreases much more slowly than in radiators with higher fin thickness.

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    Installation & Contact

    Installing the Eisbaer 240 is a royal pain in the ass! The mounting system is very poorly designed. I have encountered this style before and have been frustrated by it every time. Simply put, there is nothing to attach the backplate to the motherboard before attaching the CPU block. This means you hold the backplate (and screws) with one hand, the CPU block with the other hand, and... I don’t know. Use your third hand to tighten everything together? I spent the better part of an hour trying to install this kit by myself to no avail.

    I could have removed the motherboard and laid it down on a table which would have kept the backplate and screws steady but this isn’t 2004 and rear motherboard access in cases is a thing now.

    Peculiar mounting systems aside, once the unit is installed it is held securely in place. The tubing is on the rigid side and the quick-disconnects sit right at the spot where the tubing bends which pushes it against the side of the case.

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    Contact with the CPU is solid but not easy to achieve. Because the mounting system needs an extra pair of hands you're going to want to go slow. There is some smudging present during the install and removal but overall the waterblock has strong, even pressure across the base.