What's the most extreme cooling you've ever used?

[biohazard 76]

So whats the most extreme that you did for cooling your system? About me, once I had water cooled my PC which I think was the most extreme one. I didnt use much hardware for that and was having a pre built kit.

[F1RE]

I did air cooling and that was the most extreme for me.

[envo diverter]

I have had Passive chipset cooling with adhesive tape.

[spectre330]

I never went beyond air cooling. I never went for WC although they are good as said. I feel they were costly enough for CPU and GPU. Instead I would upgrade my VGA card or the CPU that will give me still better performance rather than WC with new setup.