- PEX1TO162 - PCI-Express x1 to Low Profile x16 Slot

So, to answer your original question, if you're happy to abandon any other PCI devices you currently have, you can choose a motherboard with more PCIe x1 slots;

2 is x4 from CPU, 1 is x4 from chipset, the other 4 are split from the physical x16 slots via switches) With some to PCIE slot adapters you

pcie x16 slot A PCIe or PCI express slot is the point of connection between your PCIe x1 • PCIe x4 • PCIe x8 • PCIe x16 These connections are

pcie training error slot 1 if the slot is open like that, you should be good to go if it's not open, you could a) use another riser to adapt the x8 to x16, or b)