For a KNC Jupiter it could well end up drawing 750 Watts (perhaps a bit more) -- I would recommend a 1000 Watt supply as the minimum.
It would be better with a 1200 Watt capable supply. (Safety margin)
Most engineers like lots of safety margin. In this case the extra cost is cheap insurance.
You think KNC engineers have made the wrong recommendations with 850W PSU?
KNC makes this recommendation:
What specs do I need for the powersupply?
- A power supply (PSU) certified as 80+ Gold (high quality power with low variations).
- for Jupiter models, an 850 Watt PSU with a minimum of four separate PCI-E adaptors (6 pins or 6+2 pin).
- for Saturn models,a 600 Watt PSU with a minimum of two separate PCI-E adaptors (6 pins or 6+2 pins).
- for Mercury models, a 400 Watt PSU with a minimum of one PCI-E adaptor (6 pins or 6+2 pins).
However, as some pointed out the new firmware is causing some units to draw more current (power).
You pays your money -- you takes your choice.
It's your money sunk into those miners -- not mine.
I think that some have pointed out their Saturns are running close to 360-380 Watts -- a Jupiter has two more towers.
Some of us own voltmeters and know how to use them -- so our opinions may be biased by the readings.
Cheers!
Yes but the initial firmware was drawing around 550 watts at the wall, so you have an entire 300 watts grace. I've also seen those 850s comfortably pull 1000W recently, though I doubt they do so long term!
i'm sorry to correct you, but the initial firmware(0.90) was 890-910W--- 0.9V @ ~60A per VRM