Nice, what will be the immersion fluid? Be sure to put something like copper sulfate in the glycol loops to prevent inferior organisms taking over.
Novec 7100. I have some test fluid on the way and hopefully I can get a test Neptune in the fluid on Monday or Tuesday and see how it does.
I don't think we've seen too many of the larger farms utilize liquid cooling. Yours may be the first large "do-it-at-home" one.