>For optimal performance, we recommend the sum of VRAM + RAM to be at least 80GB+. Oh nice! So I can try it in my local "low power/low cost" server at home. My homesystem does run in a ryzen 5500 + 64gb RAM + 7x RTX 3060 12gb So 64gb RAM plus 84gb VRAM I dont want to brag around, but point to solutions for us tinkerers with a small budget and high energy costs. such system can be build for around 1600 euro. The power…
How are you arriving at those numbers? ryzen 5500 + 7x3060 + cooling ~= 1.6 kW off the wall, at 360 GB/s memory bandwidth, and considering your lane budget, most of it will be wasted in single PCIe lanes. After-market unit price of 3060's is 200 eur, so 1600 is not good-faith cost estimate. From the looks of it, your setup is neither low-power, nor low-cost. You'd be better served with a refurbished mac studio (2022)…
Now add that this guy has 7x3060 = 100% miner. So you know that he is running a optimized profile (underclocked).
Fyi, my gaming 6800 draws 230W, but with a bit of undervolting and sacrificing 7% performance, it runs at 110W for the exact same load. And that is 100% taxed. This is just a simple example to show that a lot of PC hardware runs very much overclocked/unoptimized out of the box.
Somebody getting down to 520W sounds perfectly normal, for a undervolted card that gives up maybe 10% performance, for big gains in power draw.
And no, old hardware can be extreme useful in the right hands. Add to this, its the main factor that influences the speed tends to be more memory usage (the more you can fit and the interconnects), then actual processing performance for running a LLM.
Being able to run a large model for 1600 sounds like a bargain to me. Also, remember, when your not querying the models, the power will be mostly the memory wakes + power regulators. Coming back to that youtuber, he was not constantly drawing that 130W, it was only with spikes when he ran prompts or did activity.
Yes, running from home will be more expensive then a 10$ copilot plan but ... nobody is also looking at your data ;)