I meant the mini PCIe to full PCI - like in mining rigs.
Yes, I have some of the mini PCIe cables.
As far as I know they run at x1 speed and when I tested an RTX 3080 Ti card using one of them it performed very slow.
The number of PCIe lanes used by the GPU for CudaBISS is important, to get the fatest speed with CudaBISS the GPU needs to be given 16 PCIe lanes.
If there are two GPU in a PC and one runs with 16 PCIe lanes with the other having 8 PCIe lanes, the GPU with 8 PCIe lanes runs slower for the key search.