Have not done anything further about soundproofing as at the colder weather temps, fan speeds and noise is lower anyway.
So I have been looking at moving from CryptoNight to Eth on my AMD rigs. But it's a bit challenging with the BIOS mods, clock and miner settings and while the GPU's were just fine in close proximity on Onda motherboards for CryptoNight they are getting too hot on Eth.
I am also going to make a micro rig for my 1080 Ti's that are currently running in my old computer as I need something to keep one of my small bedrooms warmer. I bought this motherboard with integrated CPU for £25,
it's only 17x17cm
https://www.ebay.co.uk/itm/Pegatron-...53.m2749.l2649
I will put 2 Ti cards on it with adapters, 1 either side of motherboard, one upside down so that both have fans on the outside and blowing exhaust in the same direction. The PSU will go on top of motherboard sucking air from the motherboard and blowing out in the same direction as GPU's. On the top will go acrylic or similar oversized panel with a a picture or artwork. This can then be attached to the wall high enough for kids not to reach it , blowing warm air downwards and looking like a piece of art.