The system unit of Dell Optiplex 7010 SFF, on which 2 PCI-E x16 slots got. To documentation it is written that one of them PCI-E x16 (wired x4). And also for this model network wire and wireless adapters of own manufacture of Dell are on sale.
1. What means PCI-E x16 (wired x4)? It means, what on this slot except 16 it is possible to plant only 4 a card?
2. Whether any will work PCI-E the wireless adapter of other vendors on this slot?