PCI-Express slot speed and utilization?

PCIe Slot Characteristics - SPARC S7-2 Server Service Manual pcie 2 slot GEONIX GEFORCE GT 730LP 4GB DDR3 Graphic Card 64bit Dual Slot Multiple Outputs- VGA, HDMI, DVI Support PCI-e2 Profile ZORBES® Graphics Card Bracket, pcie 4 card in pcie 3 slot PCIe x32 However, the connection will run at the speed of the slowest device, so a PCIe SSD can only run at PCIe even in a slot that supports PCIe

pcieslot EZ-Latch Plus：PCIe x16 slot & slots with quick release design; UC Ultimate Scalibility: 3*PCIe x16 slots for Multi-GPU and 4*PCIe x4 slots