This is just a theoretical idea i came up today, after i've seen an add for a peltier waterblock cooler.
I've found an other post where they wanted to replace the radiators with peltier cooler(s), but my idea is different:
What if we build a normal liquid cooling loop, but we add a peltier chiller between the pump and the CPU/GPU block. something like this: DIY peltier cooler, just beefier.
Depending on how many peltier elements you use and how good is their cooling you probably can go subambient aswell, if that's what you want.
I know cooling with peltier elements can be inefficient and they can also fail, that's why in this loop they are just an extra, you could also add a controller which turns it off if not needed.
Well in short, that's it, i'm not good at writing well constructed texts, but i'm curious of your opinions.