The definition of overkill_ Cooling an RTX 4090 to a claimed 20°C with a household air conditioning

I've seen some wild and wacky PC cooling solutions in my time, but this one might beat them all: An RTX 4090 cooled with a household air conditioner.

Chinese techtuber 电解碳酸钠 (which machine translates to "Electrolytic sodium carbonate") has shown off the extreme cooling system in

The channel says that it's still waiting on a water block for a planned build, but in the meantime the air conditioner has been hooked up to an , dropping temps down to a claimed 20 degrees Celsius under load (via ).

Given the power (and size) of the air conditioning unit used here, that's probably no surprise. It's rated to 12,000 BTU of cooling, with a 1.2 kW power draw. That means it's not exactly the most efficient of cooling solutions, although it is mounted on castor wheels for, err, ease of use.

And it's even been festooned with a faceplate featuring the logos of some popular PC hardware brands. I don't think I've ever seen Nvidia, AMD, and Intel logos featured quite so prominently on a build—but when you've got this much chassis real estate to play with, why not.

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The processor on the test system is Intel's , which also appears to be cooled by the outer air con unit. Well, it does run a little hot, after all.

Two hoses are diverted from the outside of the air conditioner into the rear of the PC and then into what looks like respective water blocks, and, aside from the bulk of the air [[link]] conditioner itself, it seems like a surprisingly neat and tidy job.

Plus, you can even feel the breeze as your PC plunges to extremely low temperatures, as our host demonstrates by sticking her head in front of the main fan:

Well, it's all in good fun, isn't it? The host later says that the setup seems ready for the addition of a and , and possibly even a future RTX 6090, too.

Given that we've been impressed with the performance of the RTX 5090 FE cooler (and by how despite the mighty power of the chip inside), all of this seems very unnecessary. However, if ultimate cooling is the goal, it's difficult to think of a system that would provide more headroom than this.

Should it take the top spot as an addition to our guide, perhaps? Err, no. A 12,000 BTU air conditioning unit is a very expensive and impractical thing, at least for these purposes. [[link]] Still, hats off for the attempt, at the very least.