About PSU and OS

[Melamol]

I know that there are several Tutorials online, but sometimes a read contradictory things and before I burn my house down I what to make sure. So here a few questions.

As far as I have understood it, one has to connect riser and Gpu always with the same Psu and not riser with one and gpu with a different. Right now I connected my Maninboard, fans, 5 gpus, and 5 risers with one Gpu. The other PSU powers the other 5 riser and gpus.

Is it ok to just short the 2 connectors from the 24 pin on one Psu wich is Not connected to the Mainboard or do I need to bridge the second Psu to the first one? Sometimes I have read that there has to be a resistor between those two pins. Or maybe short them on both psus so they both are always on?

Is it OK to connect for ex. a 3080 wich needs two 8 pin with one 8 pin through using a Y splitter and connecting the riser then to a different 8 pin?

And in addition I am looking for a new OS what is your excperiance? Most importantly for me is of course performance. Do they all perform the same? Right now I am using t-Rex on windows.
I know, that there are a lot of pretty looking OS wich are specialized for mining and have a good GUI (like RaveOS, Hive OS,…), but the are cost monthly. The only free one are Linux (I guess Ubuntu is the best) and Windows. But they are Limited to 12 gpus. Is it possible to still somehow use 13 ?

Thanks in advance.

 

[cdabc123]

For the psu you can just ground the green wire (or look up the 24pin pinout to see which one). You could also tie it to the same pin on the other psu so they turn on together.

It is correct that the riser and GPU should be using the same psu. Although you most likely wouldn't damage anything running each independently with two quality psus.

For y splinters a 6 pin (8+2 or 6) would both provide enough power for one 8 pin and the riser

For os I would always just run them under Ubuntu, or windows 2012 r2, 2016. For most gpus Linux is normally best and many of the mining os run pretty well under common configurations.

 

[Melamol]

Thanks, you are confirming, what I thought to be right about the Psu.
For the OS, I will try RaveOS, since it is Linux based as well as free, as long as you use the 2miners pool. If this is not working well, I will switch to Ubuntu.