I broke my GPU retention clip and part of my GPU!!! Will it still work??

It sounds like your putting the card in crooked When you insert a card you slide it in straight Then once you have it in the slot a little bit

No it will not give you a performance decrease in the PCI-e lanes if you use that x16 slot As defaultuser mentioned the only other

gpu slot size Yep that pcie clip is truly a horrible mechanism It's like computers are designed let ppl learn

gpu slot width PCIe Gen 4 SSD Up to hours3 Boasting 2 USB Type C ports, HDMI , Wi-Fi 77, Bluetooth LE Audio, and a MicroSD slot