Hey guys, seen so many posts about how to properly power risers and that SATA doesn’t have the rating to support “UP TO 75 watts that some cards may or may not draw, maybe, sometimes.”
I have been running the 9x 580 rig on modded rom, dual mining, and the secondary PSU (1000w) pulls 1050 at the wall (6 cards + 6 risers are the only pieces on this PSU)
1- How can I determine if my specific card will attempt to draw more than spec from the pci slot instead of the supplied 8-pin?
Sorry, I'm not sure what you meant on this, PCI slot is not used by GPU only the PCI-e
2- How can I power these 6-pin risers “safely” without running out of PSU ports? I don’t mind buying cables but there’s no way I can use 1 cable -> 1 riser -> PSU
Sata/molex is safe for 1 riser on each cable, it could handle watts for 1 riser.
3 - Powering two GPUs per 8-pin (I.e. one cable into PSU that splits into two at the end, good to go? No aftermarket splitter)
I'd use this setup on my 2 Rigs of RX 480, its safe, been mining for a year now.
Meant to refer to it as PCI-E, not sure if there's a way to measure how much the card actually tends to pull from the slot.
I'm currently running SATA->6pin for 2 risers per rail, perfectly stable and not warm to the touch but I'd like to quantify this somehow.