Is it possible to run LSI SAS 9211-8i PCI-E 8 in PCI-E 16 Slot?
Solution 1:
Yes, you can plug x8 cards into x16 slots. It's more likely that your problem is that you've got a PCIe Gen2 (version 2.0) card in a motherboard which doesn't know how to deal with that. Try a BIOS upgrade.