Asus P5WD2-E Premium P5WD2-E Premium User's Manual for English Edition - Page 50

• We recommend that you install a graphics card on the primary (blue) PCI Express slot and install other PCI Express devices on the Universal PCI-E slot. • In CrossFire™ mode, each PCI Express x16 slot works at x8 bandwidth. • In CrossFire™ mode, install the ATI CrossFire™ Edition (Master) graphics card on the primary (blue) PCI Express slot. • Refer to the table below for possible PCI Express Card configurations. PCI Express x16 slot configurations NonCrossFire mode Dual graphics cards in CrossFire™ mode* PCIEX16_1 (blue) slot Card Type Speed PCIe x16 graphics card x16 PCIe x16 graphics card x8 PCIe x16 graphics card x8 A T I® C r o s s F i r e ™ x8 E d i t i o n graphics card PCIEX16_2 (black) slot Card Type NA Speed NA Other PCIe x16 graphics card x8** Other PCIe devices x8, x4, x1** ATI graphics card x8 * Install two ATI graphics cards from the same GPU family. ** The speed of the primary PCIe x16 slot (P C I E X 1 6 _ 1) changes to x8 mode after you install any device in the secondary PCIe x16 (P C I E X 1 6 _ 2) slot. We recommend that you install other PCI Express devices to the Universal PCI-E slot. 2.5.8 Universal PCI-E slot (max. x2 mode) This motherboard supports the Universal PCI Express slot with a maximum speed of 1GB/s. Some PCI Express devices can not operate in x2 mode. If this happens , set the Universal PCI-E Speed to [x1 Mode(compatible)] in the BIOS. See Chapter 4.4.5 Advanced Chipset Settings on page 4-28 and 4-29. Universal PCI-E slot 2-22 Chapter 2: Hardware information