Ok, still looking for answer if Corsair VS650 would be good to power 1 S3? I am not good with that stuff, so I will not be modifying server PSUs.
I originally deviated from my corsair cx500's that I used for the S1 and bought some sentry 750w due to the "4 pcie" but those POS won't even power one s3 when hashing starts (it powers off). They would only power half the s3. I am now powering my s3's with some cx500's. My s1's have been running on the same supplies for months... Four are using cx430 which were slightly modified...
Ok, is VS650 good to power 1 S1? Because S1 needs only 1 4pin connector as far as I remember..
PCI-e connectors are 6 pin or 6+2 pin.
The S1 requires 2 6-pin PCI-e connectors. 1 per blade.
The S3 at stock speeds requires the same - 2 6-pin PCI-e connectors. 1 per blade. If you are lucky enough to get your S3s with "good" DC/DC converters, you *might* be able to stably over clock them. If you do over clock, Bitmain states you need 4 6-pin PCI-e connectors per unit (2 connectors per blade).
As for a PSU, if you're going to power only a single S3 and not over clock it, just look for one that is at least 500W and has 2 separate PCI-e cables.
I recommend the EVGA 1300 G2. It has 6 PCI-e cables with a total of 8 PCI-e connectors (2 of the cables are doubles). You can easily power 3 S3s at stock clocks with it. If you under clock and under volt your S3 (not sure if the pencil mod trick works on these like it did the S1) and can get them to around 275 - 300W each, then that same PSU will drive 4 units.
Ok I understand, but I have seen 4pin PCIe connectors, they do exist right?
So can EVGA 1300 G2 run 3 non overclocked S3 miners without problems? If so I will go for this one then. Then I will need just 1 more PSU to power 1 S3 on its own..
Yes, the EVGA 1300 G2 will run 3 S3s with no problems whatsoever. At stock clocks, they each draw 340W from the wall, so 1020W total, which is well within the range of the EVGA.