Quote from: papampi on January 03, 2018, 11:02:02 AM

Quote from: monck on January 03, 2018, 10:54:19 AM

Quote from: WaveFront on January 03, 2018, 09:45:57 AM

So in practice, each PCIe6+2 output is powering 3 cards and each SATA output is powering 3 raisers.
I could replace the SATA connectors on the raisers with molex connectors that probably can handle more power (I will try this now), but I see that my best alternative is to put another PSU adding more PCIe 6+2 outputs

Hi WaveFront,
I am using the same MB with 11 Zotac 1070TIs and Server PS.
To get a better understanding of the power distribution I was measuring some parts.
In my case the risers are using 25W each - means 2Amps
Most PS having a chain of 5 SATA connectors on each channel - this is more than the wire can handle.
As you have only 3 connector areas for each voltage range at the SATA connector, it would be 0,7 Amps for a single connector area which is IMO quite high - as we are using it 24 hours a day.
3 Risers is IMO the maximum and to change to Molex is not bad ;-)

I have my cards limitted to 130W - the whole system is using 1800W, which is an additional power consumption of 370W for the rest of the system.

Now that we are in power discussions, I have a question too.
Is it mandatory to connect the additional molex connectors on motherboard to psu?
All GPUs and risers get the powers directly from PSU so are they needed too?

Hi Papampi,
At least on the Asrock H110 BCT+, it depends how many PCI slots are occupied. When I assembled this last rig, I had only a feed to the molex connector closest to the CPU. After placing the 4th GPU, the mobo started to display a warning message about connecting the other molex and refused to boot until that connector was wired to the PSU.
Not sure if it is really required, but the mobo designers thought it was important enough to program a safety check into the firmware.