Z170 OC Formula, GPU in PCIE4 slot?

As far as the top slot sounds like maybe the CPU isn't making proper contact to the socket in some way perhaps due to the heatsink

PCIe4 NVMe 0 10 AIX and Linux module for AIXLinux #EC5X slot has a 15-mm NVMe form factor Optical cable adapter T1 98 IBM Power E1050

rank slot Each PCIe4 6-slot fanout module provides six full-length, full-height, PCIe4 slots The PCIe4 slots are compatible with PCIe1, PCIe2, and PCIe3 adapters The

horror slot A PCIe x1 slot for example, has one lane PCIe x2 has two lanes, x4 has four, and so forth Unlike the older PCI standard, which can send data