I first heard of Watercool (the company) in 2012 when I was beginning to get interested in building my own PC. They have been around for what seems like ages now, making some very memorable products in the area of custom loop watercooling. In fact, their MO-RA3 420 Pro radiator is something I don’t think I will ever let go of, and I have since come to become a fan of their unique waterblocks also. So when they announced that the successor to their Heatkiller III CPU block was coming out, I jumped at the chance to take a look at it myself. As with most CPU blocks, this comes in a variety of options to choose from including also a Pro version and a Basic version. Thanks to Hank from Performance PCs and Christian from Watercool, we can now take a good look at the Heatkiller IV Pro Pure Copper.

Let’s begin by taking a look at the specs courtesy the product page:

Material: Copper (top, bottom plate), polished stainless steel (brackets, inlay), nickel-plated brass ( Easy-Mount-System)
Dimensions (L x W x H): 66 x 59 x 17 mm
Weight: ca. 450 g
Sealing: NBR 70
Threads: 2x G ¼ inch (DIN ISO 228-1)
Thread distance:  25 mm
Socket compatibility INTEL:1150, 1155, 1156, 1366, 2011, 2011-3

Mounting material / Manual

Now keep in mind that the materials used depends on the exact variant you choose (full list here), with this being a full copper version. Given that, it also weighs more than the usual acetal/delrin/plexi style waterblocks at a whopping 450g. For those wondering why thread distance is a listed specification here given how others rarely report it, it is because the Heatkiller III had compatibility issues with larger fittings (1/2″ x 3/4″ compression fittings, for example) due to the ports being quite close to each other. This time, with 25mm of spacing, they have ensured compatibility on par with most CPU blocks on the market and allowing even some of the larger diameter 1/2″ x 3/4″ compression fittings to fit on easily.

The keen eyes viewers would have noticed that there is no mention of (a) warranty, (b) AMD socket compatibility and (c) a backplate for the smaller Intel sockets such as LGA 115x. For the first part, let me refer you to their standard RMA policy which lists a 24 month warranty period for all their products, including this one. We will address the latter two in the review as we continue on in the next page.

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