Does my PCI Slot still work

All that's normal. The device manager includes all sort of low-level system components if you go through it thoroughly, especially under the general "system devices" category. If there are no exclamation marks or errors noted in the device manager (which I don't see in those shots) those are perfectly normal.

What card do you have? Is it new, or used? IF used, has it worked in the past? Are your onboard graphics working? The most likely cause is a bad card. First test in a different PCIe slot, if possible test with a different card (borrowed from a friend maybe).