If I were that concerned about noise from my computers, I would leverage the inverse square law and put them in another room and use long video and input cables.
If you use HDR 4k or even 5k screens and are looking for a decent framerate, the maximum cable length is quite short (on the order of 3m for an UHBR10 DP40).
There exist solutions for that with active cables or optical cables, but that quickly gets expensive and complicated.
