- A YouTuber made a giant ‘superdome’ fan consisting of 15 separate 120mm case fans
- This 3D printed project turned out far better than a jokey prototype he previously made
- In fact, the superdome solution lowered the CPU temperature by 20C and was not noisy when it did so
If you’re a PC enthusiast and fan of fans so to speak, here’s a project guaranteed to pique your curiosity – a giant ‘superdome’ fan, consisting of a whole bunch of standard 120mm cooling fans that attach to the computer as a side panel.
As seen on Reddit, YouTuber Major Hardware came up with this idea, which was inspired by commenters on a previous project featured on his channel.
The idea of the older video was to build ‘The Destroyer of CPUs’, a tongue-in-cheek version of a 120mm Noctua case fan. It was a bizarre version of a Noctua NF-A12x25 fan consisting of 15 small (30mm) fans, arranged in a dome design.
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Done more for fun than anything else, it was impressive that the custom 15-small-fan version on a standard case fan performed exactly the same as the full Noctua 120mm version in terms of the cooling provided. In fact, it was slightly better based on Major Hardware’s testing, although the custom insert was much noisier, which was the notable wrinkle.
Commenters then suggested building a huge dome made up of actual Noctua NF-A12x25 fans, so that’s exactly what Major Hardware did.
Noctua sent the YouTuber 15 of these 120mm fans, and Major Hardware scaled up the earlier concept, 3D printing the necessary support structure, to produce a large superdome of a fan that essentially stuck onto his Lian Li PC case as a side panel. You can see the result below.
Look at
Dome and the dust
The YouTuber found the new giant dome design to be far more practical than the previous miniature effort, which was simply made into a meme.
Testing how hot the gaming PC got in a Battlefield 6 session showed the CPU temp reaching 86C beforehand (the YouTuber fully admits the cooling setup isn’t optimal here, preferring RGB aesthetics to thermals to some extent – remember the PC must see that part on YouTube). However, with the superdome fan in place, the temperature of the Ryzen processor dropped to around 66C when playing the shooter – a big difference of 20C overall.
Unlike the small prototype version, this super-sized fan also didn’t make a racket, and Major Hardware observed that it “doesn’t make as much noise”.
So were there any downsides? Well, the superdome uses quite a bit of power, although at just under 30W it’s not a watt guzzler. There’s also the issue of a lack of dust filters in this implementation, though the YouTuber notes that he’s not too concerned about that due to the way his case is set up to exhaust the hot air anyway.
In fact, Major Hardware was very impressed with the giant fan, noting that “it’s kind of crazy” how much air the superdome pushes around, concluding that: “I can just leave it on my PC as is.”
You can make your own version if you wish, as the 3D printer designs (for the Lian Li box) are available (and listed in the details on YouTube), although the other downside is the cost of buying the 15 fans required. They cost $35 each in the US at the time of writing, so you’re looking at $525 plus the cost of the other materials for printing and assembly.
Still, you end up with quite a ‘statement PC’ and one that’s pretty effectively cooled by all accounts. Just look at that dust accumulation if you’re after a giant fan-dome panel for your gaming rig.
If you’re into this sort of thing, check out a few other off-the-wall computer cases we’ve seen so far in 2026 that include a coin-op gaming PC.
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