Modern pc Power Supply's is ATX12V.
You need old (very old, and in this case definitely used) Power Supply's for AT computers . 250 watt have near 25A , 5 v line.
Interesting and cheap solution. The problem is that the miners use 24pin ATX connectors and those old connectors are 20 pin I think.
I think these old PS's are pretty loud though (this will be in the living room.)
Still a good solution, thx.
IAS