Previous post: https://monero.town/post/279294

Finished building and setting up my 4 3900 builds, read my previous post for more details. Figuring out the best way to build them into the shelf was a lot of trial and error, especially with cable management. Took a few hours, but I’m glad it worked out in the end. I was satisfied with my undervolt on the first rig, but unfortunately I was not able to transfer it to the second. I ended up just using dcop and keeping all the cpus stock for uniformity instead of individually overclocking all the machines. Right now they’re doing 12.2-12.4kh/s at 80-84c which is making the room quite toasty, should be nice in the winter (not so much in the summer). Would ROI in about 3 years at the current rate. The top machine is a 5600x which I use as a home server, running monerod and p2pool. I used to run nixos but I eventually switched back to alpine like the other 5 machines. Currently using docker-compose and nixery.

Sorry the text is so dense, feel free to ask questions.

  • crab@monero.townOPEnglish
    3·
    1 year ago

    Oh yeah, I wrote a service to change the LED colors based on system temperature so I could easily tell if xmrig crashed or something, but I think the breathing orange just looks better. I then had the idea to have the LEDs dim if CPU temps dropped but it was a lot more complicated that simply changing colors.

    Let me know if you know openrgb-rs ig

  • Fluffy56@infosec.pub
    2·
    1 year ago

    Super cool setup! It’s giving me a lot of ideas for one I might build later. Thanks for sharing this!

  • monerobull@monero.town
    2·
    1 year ago

    This is awesome, surprised that you have this low of a ROI. When I looked for parts a year or two ago I couldn’t get lower than 4,5 years and that might have been with free power :P

    • crab@monero.townOPEnglish
      4·
      1 year ago

      I live in a US suburb, electricity is thankfully cheaper than most places. As detailed in my first post, I could’ve cut a lot more corners to cut down on costs.

      I think electricity is a major factor though, roughly 1/4 of my earnings go to it. Many places have much pricier electric which will easily add years, if not making roi impossible.

    • crab@monero.townOPEnglish
      2·
      1 year ago

      Unfortunately I don’t have a way of measuring it. The CPUs have a 65w tdp so each system is probably pulling a little more than that. I have gold PSUs.