Brilliant solution!!! I'm totally going to get some PVC tubes right now. I love your setup. How did you made the slots in the tubes? Is it a carving knife enough?
Glad you like it. I actually made the slots by using a cheap miter box and hand saw. These can be found at hardware stores for $20 or less, and are very useful just for making cuts to the pipe (keeps your ends straight). It wasn't ideal, but we weren't going for good lucks or tight tolerances here
It took two cuts placed directly next to eachother to make a slot big enough for the PCB.
For the bottom, you won't be able to slot things due to the heatsink being in the way. Here I personally used zip-ties to make "guides" but I'm sure there are better options. I did see someone who made washer-clamps that wedged into the heatsink which looked to work very well.
One major change I'd propose to anyone making something similar - orientate the boards so the heatsink fins run top/bottom, and place fans underneath pushing cool air towards the top. These appear to be have made with such cooling in mind, and if you for some reason do lose your fans you'll at least have more convection cooling to help them not burn up. I'm actually running the rack of 10 w/ a box fan underneath them blowing up and it seems to work better even with the perpendicular heatsink to airflow orientation.
*rattles tip jar violently at the rich man* Haha I'm kidding. Yeah putting 2 blades on one molex set of wiring is pushing it over double the spec of the cabling. I ran it for about a week and it was warm but I dont think in danger of melting. Still, better safe than sorry.
Ha. I'm actually btc-poor now
Hopefully these make their coins back! Since all my coins were made from GPU mining, it was hard to let the game pass me by, and I'll be quite pleased to break even on these.
And yep, the wires when running 2 blades per "molex run" were probably fine to run, but certainly not something I'd have felt very comfortable leaving unattended for days on end.