And can someone explain the PCI slot system simply for me. I know graphics card use PCI Express 2.0/3.0, and that 3.0 graphics cards are backwards compatible. What does PCI really mean and how many types are there? Does the wireless use a type of pci?
PCIe (PCI Express) and PCI are completely different - they have nothing in common other than that they are used for add-in cards. PCI is being phased out.
The 1.0/1.1/2.0/2.1/3.0 is the version of the protocol, which deals with such things as speed and control signals. All backwards compatible, though there were issues with some of the (very) early MBs.
The number of lanes, usually written as x1/x4/x8/x16 etc are how many connections there are. any number of lanes on card and MB slot work, but most slots have ends that don't allow longer connectors. GPUs are x16, MBs usually have an x16 and sometimes an x8 that can hold an x16 length card. They also usually have x1 slots, like that WiFi card is.