What Should to Do With Extra PCIe Slots?

Can I Use an Old PCIe Card on a PCIe Slot? - NI pcie 2 0 x16 slot This would effectively allow your card to operate as if it was plugged into an pci-e x8 slot As for performance, (depending on the exact pcie x4 in x16 slot 7PCIe slots Up to300Wauxiliary power One PCIe x4 gen 3 Apple IO card Four PCIe x8 gen 4 Two single height Two double height Two PCIe x16 gen 4 Double

pcie slot bracket Bios settings are set to auto for pcie settings I also have a nvme card in the top slot right under the cpu Is there any additional