What is an Expansion Slot and How Does It Work?

Pci Slot - pci 1 slot A PCIe x1 slot is used to plug in low-demanding PCIe expansion cards that do not have a very high throughput , pcie x16 expansion slot Hi everyone,I've some PCI cards that I need to someone please list me all the Dell workstation towers that have at least 1 PCI full

pcie 1 slot What is it and how can I use it? (With 1-slot GPUs, other connectors are visible, including one which is probably the old PCI connection