Hacker News new | ask | show | jobs
by XMasterrrr 647 days ago
Oh yeah, my original setup was an RTX 4090 + an RTX 3090, and I swear one night I had the circuit breaker trip more than 15 times before I gave up. I have a UPS so I would run to the box before my system shuts down. Most houses are equipped with 15amp 120v breakers, these should never exceed 1500w, and their max is 1800w but then you're really risking it.

So, as mentioned on the article, I actually have installed (2) 30amp 240v breakers dedicated entirely for this setup (and the next one in case I decide to expand to 16x GPUs over 2 nodes lol). Each breaker is supposed to power up to 6000w at ease. I also installed a specific kind of power outlet that can handle that kind of current, and I have done some extreme research into PDUs. I plan on posting about all of that in this series (part 3 according to my current tentative plans) so stay tuned and maybe bookmark the website/add the RSS feed to your digest/or follow me on any of the socials if this is something that you wanna nail down without spending a month on research like me :'D

1 comments

Thanks! Yeah the 4090’s are very thirsty if you let them be, I haven’t played enough with throttling their voltage and how that affects perf. Looking forward to your articles.