PCI Express 2.0 x16: 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)
(All PCI Express slots conform to PCI Express 2.0 standard.)
Memory Standard: DDR3 2133(OC)/ 1866/ 1600/ 1333/ 1066** Due to CPU spec., AMD 100 series CPUs support up to DDR3 1066 MHz. With ASUS design, this motherboard can support up to DDR3 1333 MHz.