Yes. You can put 2 on each. I've been doing for a while without any problems.

you have to be careful on how the plugs are.. some psus will have no problems supplying power to 2 s3s, or even 3.. but you may run into a problem like i had

i was running 2 S3s off of ONE Seasonic x850 PSU.. there was no problems with the watts.. the problems was it has 4 PCI-E plugs with 2 ends each and i had all 8 plugged into the s3s..
this was the result.




im now running 2 off a rosewill lightning 1300 and one off the 850.

even tho the rosewill 1300 can do all 3, there is only 8 pci-e plugs.. so you are 4 short. (2 of the pci-e plugs have 2 each, so this is also an issue)

this happened awhile ago.. i got a new cord.. altho the socket is burned out a tad i just used the one next to it.. the psu has like 6 places you can plug the pci-e cord in..

it was like that for about 8 months.. just one day the rigs were offline so i went to check and the psu had tripped the power protection..

i had both pci-e connectors plugged into the one cable.. in the future i will not, and nobody should, use both pci-e plugs on the same cable.
i see pics all the time like this, even tho this is an s5..


and this is a bad idea.. running 200+ watts through one pci-e line..

i think bitmain should have used the 8 pin plugs..

I'm glad you got it running again.  PCI-e just a good cord and common cord for miners to use.  But it does have limitations (some psu's are better then others).  But pretty much any newer atx PSU has them that is why they are popular.

On that it was essentially one cable even though you  put it in two spots, since it was the two were sharing power.  Sorry you had that experience though. Definitely in future don't daisy chain the power like that.

I don't think so. He clearly say "bitmain should have used the 8 pin plugs.. "

no, if you look at newer video cards they have 2 8pin connectors instead of 6 pin..
they have 2 extra grounds.. that allow the cord to use 150 watts instead of 75.

the s5 is over the 6 pin pci-e spec and the s3 was close to it or over by just a tad if you oc.




and only crappy PSUs daisy the 2 extra grounds, my season has actual 8 wire cables.

that is a really nice power supply..
i would probably have bought one. but

1. The PSU cannot be used in countries with a mains power voltage lower than 205V. The PSU will not start below this voltage.

they kind of dropped the ball with that one..

hi can someone show me pic how to connect all cables on rm 850 with s3+. Thanks

Well, I'm done for now.  I was mistakenly working with an old cost/kw, thinking the base was 7½¢ per but now the base is up over 8¢ and realistically working the gross cost per kw, 10.147¢.  I was running two S3's, 1½ S3+'s, two C1's, fans and pumps, window fan, and 1 S5, plus 2 laptops (could have gotten away with one).  Took two days meter readings, 112.5kw each day, then 24 hours no miners, 16kw.  Now there's likely a sliding scale with a lower surcharge with greater usage but this tells me that discounting that my base usage will cost more, it cost me $348 gross per 30.5 day month, $49.52 per month non-mining related, or $298.48 in mining costs (not counting power supply repair parts costs) while I took in ~$247 last month.  Or I lost $51.  I'll go a few days and get a better average for non-mining costs, then fire up the S5 for a day and see what I get.  But it looks like I'm done except in winter and that's relatively short down here in rural Georgia.