Is it possible to run S19 Pro with a second or a dual PSU?

[oxo_oxo]

Hi, is it possible to equip the S19 Pro (110 Th/s) with a second PSU? The manufacturer of our immersion system has customers that power the S19 with a 5000 watt PSU. Together with the liquid cooling the S19 Pro run with 195 Th/s on average. When the braiinsOS+ runs on the S19 soon, the efficiency will probably go a bit higher.

[1715507453]

1715507453

[1715507453]

1715507453

[NotFuzzyWarm]

The S19 - and ALL miners using a built-in PSU - use custom PSU's that cannot just be replaced with a different one. These miners use a programmable PSU that the controller talks to for setting the chip string voltage vs using a fixed 12VDC supply followed by on-board 2nd stage DC-DC regulators.

PSU voltages can now range from 15-21VDC depending on make/model of miner and the miner settings.

[jackg]

Also I don't think it's sustainable to run an s19 Pro at 195TH/s by adding a second PSU, you might just end up burning the chips or something - even if it did work for a few days which I think is unlikely.

[NotFuzzyWarm]

Also I don't think it's sustainable to run an s19 Pro at 195TH/s by adding a second PSU, you might just end up burning the chips or something - even if it did work for a few days which I think is unlikely.

As long as they are immersion cooled the miners will probably be fine IF the PSU's are:
 a) programmable
 b) able to be ran in n+1 (parallel) configuration or at a minimum the hash boards are individually powered ie 1 board, 1 PSU.

If they are air cooled - terrible idea!

[philipma1957]

I have been thinking about this. Braiins after market firmware allows you to pick voltage .  

An aftermarket firmware could bypass the custom psu and run the gear at a set voltage.

No auto  tuning

say 3 freq choices and 1 voltage choice. 13 volts for sake of argument.

this means you could run s17 or s19 with a 13 volt  psu but underclocked.

Now off the top of my head. the minimum voltage of the s19 psu is 12 volts.

and the minimum voltage of the s17 psu is 14 volts.



I will go back and check that

s19 psu is 12-15 volts

https://shop.bitmain.com/product/detail?pid=00020210302152412332Xrq3G3E60644

s17 is 14.5 to 21 volts
https://shop.bitmain.com/product/detail?pid=0002021022213584950310xD5QtJ0652


it would be possible to use any psu with say 13-14 volts for the s19  with a properly done aftermarket firmware.

and a 16 volt psu would run the s17

you have less frequency choice but it would work.



All this is the industry making good gear trash due to no psu availability.
another way to fuck the miners.

I have 4 units over 200th dead due to psu issues. so I have 1.45ph not 1.65ph mining.

[oxo_oxo]

I know the operation with two power supplies from the server area, there it was called load balancing. Both psu run at half power and are thus spared. If one power supply fails, the second is still in operation.

which process generates more TH/s in this operation? Is it generally because more current flows and is available or because the load of one psu is distributed over two and thus more efficiency is generated?

[oxo_oxo]

Is it to be understood that with immersion cooling the overclocking draws more current up to a certain point. At some point the psu reaches its limits, if I want to overclock beyond that I need more psu to ensure the greater power requirements? With this method, would using the braiinsOS+ when the S19 release happens make overclocking even more efficient? Will overclocking and braiinsOS+ work together in immersion cooling systems?