I'm currently putting together my PC build, and the only piece I'm missing is the AIO cooler. I'm using an ASUS ROG STRIX Helios II case, paired with a Gigabyte Gaming 5090 OC GPU and 2x32GB DDR5-6400MHz RAM (thankfully purchased before the prices skyrocketed). I want to know if I can fit a 420mm radiator, specifically the Eskimo Pro or Thermaltake TH420, in the top. These radiators are 27mm thick, and I'm planning to keep the standard ASUS fans that come with the case. Although the specs say the top can fit a maximum of 360mm, I've seen reviews indicating that a 420mm could work as long as it isn't too thick, like an Arctic 420. If anyone has experience or advice on this, I'd really appreciate it!
4 Answers
Never mind, I looked up the manual and it turns out they actually do say that 420mm radiators can be installed at the top! Huge thanks for the nudge to check that out!
It might be a tight fit, but you should be able to make it work. The Helios II is rated for 360mm, but manufacturers often err on the side of caution with those specs. With a 27mm radiator and around 25mm for the fans, you're looking at about 52mm total thickness, which should clear most motherboard and RAM setups. Just make sure to measure the distance from your RAM to the case ceiling—especially since your 6400MHz sticks might have chunky heat spreaders. If that space is around 55-60mm, you should be golden! Also, with your 5090 generating a lot of heat, a 420mm cooler is definitely a smart choice if you can fit it.
You know, it'd be nice if there were a manual you could check for the specs on your case. But seriously, you might want to consider the old 'saw' method if it doesn't fit! Just make sure you're ready for that.
Honestly, the best way to know is just to give it a shot! Each build can vary a bit, and there’s really no substitute for trying it out yourself.
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