Hello.
Got question.
If i have 1080ti which is connected with 2x 8pin is it going to draw any power from pci (riser) ?
At 100%tdp card draw 250W, 2x8pin should provide up to 300W. So should i leave at least 50W per riser?

My rig is connected like this
PSU 750W powering:
-mobo (cpu, ssd, 6risers)     
-2x 1080ti                       

PSU 1200W
-4x 1080ti

Everything is good, Rig is running undervolted anyways
I have been trying different connections, gpu+riser per psu also, all have been working fine for me
But if i want to run mobo+risers from first psu, and gpu's from second psu, should i always leave that 50-75w free per riser?