Z690 PCIe slot question

Hello community, I just bought a used Z2 Mini G3 Workstation and added a HP Z Turbo Drive G2 SSD to the slot on the

In this video, I tested the PCIe gen 3 slots to see if there is any performance difference when

pcie slot cover x16 PCIe slot supporting x8 PCIe Gen4 Key M slot with x4 PCIe Gen4 x4 + 3 x1 USB*, USB Type-C connector

pcie expansion slot Crucial P3 1TB PCIe 3D NAND NVMe SSD, up to 3500MBs PCIe x4 x8 x16 Slot USB Type C · 1 out of 5 stars 50+ bought in