Hello, I just ordered a Jupiter board and I want to prepare the rest of my setup before it arrives. Ideally I want to use a 55x25 jack power supply instead of ATX.
Are 65 watt chargers enough or do I need to get 120 watts?
I searched (“site:milkv.io/docs/jupiter watt”) the documentation for the Jupiter and found nothing (yet).
So I’ll look elsewhere for a reasonable guesstimate of how much you might need:
5-7 watts for a 16GB BPI-F3 with a MicroSD card at a guess
https://www.reddit.com/r/RISCV/comments/1en1eb3/banana_pi_f3_with_16_gb_ram_constantly_freezing/
For a NVME writing data lets say a peak power of 12 watts
( https://storedbits.com/ssd-power-consumption/ )
EMMc ~0.5 watt
You would also need a maximum of 2.5 watts for each USB 2.0 device that you add and 5 watts for each USB 3.0 device that you add. With 2 of each that would be a maximum of 15 watts.
You would need more with PCIe graphics card, but lets ignore that for now.
So I would guess add more for what ever you plan to attach to the Jupiter
So my guesstimate would be 44.5 watts. Less if you were not planning to use any high power USB device and more if you were planning on using a PCIe GPU card. Since 12 DC to 5 DC voltage converters not 100% efficient, add in a fudge factor. so call it about 50 watts. so 65 watts sounds reasonable, but if you planned to use a GPU 120 watts might be better. if you did not plan to any have high power using USB devices plugged in you would probably get by with less than 65 watts.
How much power you will need, for how you plan to use your computer, is always something that you will know better than anyone. Sometimes you can save some money by knowing that you will never have 4 high power USB devices connected at once ever, and that you will never use a PCIe graphics card.
I used to skimp on power supplies (picking one with 10-20% more capacity than I planned to use), they would run very hot and I had to replace them regularly when they failed every few years. Now I just over spec them by a lot (80% more capacity than I planned to use today), and because the higher end ones use better quality higher spec components, under lower loads they will basically run cold and last a good 20 years without any problems.