Best PC Cases for Water-Cooling 2021

What makes the best PC case for water-cooling builds? It's all about size, radiator support, and how easy it is to build custom water-cooling loops inside the chassis. We've rounded up our favorite PC cases that will go well with a water-cooling loop, allowing you to push your system and creativity to new highs.
Showcase
Our favorite case is the Thermaltake Tower 900. I mean, just look at it. This is a PC builder's dream to put together a water-cooling loop. You can even run multiple loops, one for your GPU and the second for your CPU.
Super Tower
Corsair's Obsidian 1000D is a beast of a case. You can technically install two PCs inside this case with two power supplies and more. If you wanted to create a truly unique-looking standard tower build, this is your case.
Wall Mountable
Thermaltake makes some of the more compelling cases, and the Core P5 is about as unique a case as you can get. Think outside the case for once and mount it to your wall. Just watch out for dust since it's completely open.
Easy Installation
The Conquer 2 from Cougar is brilliant, especially if you prefer some open space to get your water-cooling loop just right. The inside tray can be removed from the outer case, allowing you to install everything before sliding it into place.
The best PC case for water-cooling
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If you're looking for a case to help you showcase your system build, the Thermaltake Tower 900 is a case you should strongly consider. It's a gorgeous chassis that can support two reservoirs and pumps for separate loops, one for your GPU and another for a CPU, allowing you to create some awesome-looking results.
Prefer to work with a traditional tower chassis? The Corsair Obsidian 1000D is probably the better option, rocking a more subtle look than the Tower 900 from Thermaltake, but still allowing you to pack so much inside. You can even go all out and install two PCs inside.
We also rounded up what you need to build a custom water-cooling loop for your PC if you're not sure where to start.
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Rich Edmonds was formerly a Senior Editor of PC hardware at Windows Central, covering everything related to PC components and NAS. He's been involved in technology for more than a decade and knows a thing or two about the magic inside a PC chassis. You can follow him on Twitter at @RichEdmonds.