Here is a portion of the specifications for the Gigabyte GA-PA67A-UD4:
- 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 x8 (PCIEX8) * The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot will operate at up to x8 mode.
- 3 x PCI Express x1 slots
(All PCI Express slots conform to PCI Express 2.0 standard.) - 2 x PCI slots