Hi, i have a serious issue with my new z270-p board. No slots works with risers, i have tried them with a dozen differrent. All the right settings in bios (4g envoding, gen 1 etc), latest bios and fresh windows 10 install. Gpu-fan is running but cards doesnt show up, tried with 5 different cards (and they do work connected directly in pci-e slot). Any ideas?