Wouldn't four double PCIe cables mean you can connect four GPUs? Then use four of the remaining single ones for GPU 5 and 6?
Sorry, I'm getting confused with the cables, apologies.
I've managed to connect 2x Radeon VII with 4 x 8-pin pcie cable.
Now I have 5 of these :
https://images.evga.com/products/gallery/100-CK-1300-B9_XL_4.jpg (I think its 6+2pin + 6pin connector)
