where is the pcie slot

UEFI0067: a PCIe link Training failure is observed in PCie Chassis Slot 4 and the link is disabled. Dell server model is FC 630.

And the thing which I love most about the PCIe is that you can use any PCIe Card on any PCIe Slot, that means you can use easily use any PCIe x16 card in any PCIe x1 slot or vice versa.

I read that the Dell XPS 8300 came with a PCIe (x16) slot (where the video card goes in) and three PCIe (x1) slots for any other cards you may want.  So I ...