Sorry just learning this stuff what is HBA? This is the new motherboard I am planning on using. Does this help?
1 x PCI Express x16 slot, running at x16 (PCIEX16)
* For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot.
1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the SATA Express connector. When the SATA Express connector is populated, the PCIEX4 slot operates at up to x2 mode.
2 x PCI Express x1 slots
(All of the PCI Express slots conform to PCI Express 3.0 standard.)
2 x PCI slots