r/computing

I had this idea for AI data centers.

Instead of using huge amounts of fresh water for cooling, what if we built AI data centers next to big underground sewage or wastewater tunnels? The servers would be completely sealed inside a waterproof structure, and they wouldn't touch the wastewater at all.

The idea is to use a closed-loop liquid cooling system, like a gaming PC. The coolant would keep circulating through the servers, and a heat exchanger would transfer the heat to the continuously flowing wastewater. Since the wastewater is always moving, it could carry away the heat without using large amounts of fresh water.

Another advantage is that these data centers could be built in cities where fiber-optic internet cables and power lines already exist underground, so they would still have fast internet and reliable electricity.

I know there would be engineering challenges like flood protection, maintenance, and environmental safety, but I think it's an interesting concept that could be researched further. It might help make future AI data centers more sustainable while making use of infrastructure that's already there.

What do you think? Do you think something like this could actually work?

Starting CS this fall, 300km from home. Got a 5700X + 4060 desktop but can’t bring it. Home only 1-2x a month.

Debating between a budget no-GPU laptop vs one with a dGPU. Main question — for hackathons and local AI agents, do I actually need CUDA or can I just use Colab/cloud GPUs and call it a day?

Was the dGPU on your laptop worth it, or did you end up on Colab anyway?

We tested exactly that at Trijna Labs.

We've published a short video showing part of the training process. If you're interested, watch the video and check the YouTube comment link for the unedited raw training footage.

We're looking for honest technical feedback, criticism, and questions from people working on AI systems, model architectures, training infrastructure, or efficient inference.

We're also open to collaborating with researchers, engineers, builders, and anyone interested in helping push the project forward.