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Maximum Safe Wattage of PSU Cables

Updated 17Jan2018

How to Power Your Cards and Risers


There are certain rules that you must follow when powering your GPU Mining components. This is certainly one of the most frustrating issues to deal with when first assembling a mining rig. Do you have enough cable ports on the PSU? Do your cables have enough connectors? And how much power can each connector safely supply?



So now we're looking into "How much power can each connector safely supply?"
It's ridiculous how much misleading information there in on the internet regarding this subject. The problem lies in the fact that PCI-SIG is the proprietary owner of the PCIe connector design and it costs a LOT to even view the PCIe connector electrical specifications. Furthermore, the specifications rate the maximum power draw far under what some armchair electricians *think* the maximum power draw should be given the gauge of the wires involved. Be careful and stick with the maximum power draw that the creators of the connection devices intended.

Short and to the point, here we go:


How much power can each PSU cable safely supply?

PCIe connections (and splitters)
Perif (molex) connections
SATA connections

Putting it all together:

Preferred way to wire a multi-PSU 6-card rig:

Click on the diagrams to expand. As always, I hope this helps clear up some confusion and prevents your overloaded components from catching fire. Let's be responsible about this!

Be Responsible!

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