External air cooling has the advantage of more CFM and with less noise too, especially when you can control something like the 8" AC Infinity directly from the control board using the njord adapter.
Yeah surely it can help as I studied this with BitCool Dielectric Coolant technology. If this can be merged with the old ASIC then I think there is higher chances they would outperform with less noise and high efficiency. I’m now clear on one fact that the older the units the more unprofitable they get due to reduced hardware capability. The only fact that remains is whether cooling them to lowest plateau could help them boost their processing activity or not. I’m seeing hundreds of videos where immersion based tech is evolving very fast and it’s even widely used in gaming industries with high GPU powered gaming stations. I think similar steps can be taken into old miner installation if they are resistant to liquid phases.