PCIe vs : Is PCIe Worth the Upgrade?

About a month ago I removed the broken PCI-Ex slot from this motherboard but the replacement

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pcie training error slot 1 full-length dual-slot PCIe card For details refer to the NVIDIA Form Factor Specification for Enterprise PCIe Products

pcie x1 in x16 slot PCIe x16 slots are generally intended for use with Graphics Cards PCIe 1x slots are generally for smaller add-in cards like Wifi Adapters, USB Adapters, or