Looking for explanation on the issue with Z790 boards sharing PCIe

Looking for explanation on the issue with Z790 boards sharing PCIe gpu with m2 slot 2 slot with PCIe ×4 connectivity The slot is located directly on the graphics card PCB It's placed rather handily on its top side (when the gpu slot name Anything gets plugged in you lose half the slot whether it needs or and x4 or x2 makes no difference Lower slots are wired through the

gpu slot name The backside of this graphics card integrates an slot capable of PCIe speeds, for high-performance NVMe storage devices up to 80 mm long—and the SSD

gpu slot They presented a concept RTX 4060 Ti GPU with Samsung 980 PRO 2TB SSD attached to the backside Most SSDs these days are installed in The graphics card's slot connected directly to the CPU, whereas some motherboard slots transfer data via the PCH channel Testing