I have one rig (A) with 1600 Watt PSU and only pulling 850 Watt from the wall with 6 GPUs running, another rig (B) with 1000 Watt PSU and pulling 1010 Watts from the wall with 6 GPUs running.
Can i disconnect power supply of 2 GPUs from rig B and plug them on rig A's PSU ? i will keep them running on on rig B's mobo (connected to mobo through powered risers from rig B PSU).
Is this doable ? am i risking to fry something ?
If the number of connectors works out, just swap the PSUs.
I would strongly recommend against mixing connections between the two rigs. While it is doable, you start mixing points of failure between two rigs that could otherwise operate independently.