Asus P7P55 User Guide - Page 44

2.5.5 PCI Express x1 slot This motherboard supports PCI Express x1 network cards, SCSI cards and other cards that comply with the PCI Express specifications. Install a PCIe x1 device to a PCIe x1 slot prior to a PCIe x16 slot. 2.5.6 PCI Express 2.0 x16 slots This motherboard has four PCI Express 2.0 slots, two x8 link and two x8 or x16 link. These slots support VGA cards and various server class high performance add-on cards. PCI Express 2.0 x16_5 slot (x8 link) PCI slot PCI Express 2.0 x16_4 slot (x8 or x16 link) PCI Express 2.0 x16_3 slot (x4 link) PCI Express 2.0 x16_2 slot (x8 link) PCI Express x1 slot PCI Express 2.0 x16_1 slot (x8 or x16 link) • When PCIe 2.0 x16_2 and PCIe 2.0 x16_5 slots are occupied, PCIe 2.0 x16_1 and PCIe 2.0 x16_4 will work at x8 link. • In single VGA card mode, use first the PCIe 2.0 x16_1 slot for a PCI Express x16 graphics card to get better performance. • We recommend you use the PCIe 2.0 x16_1, PCIe 2.0 x16_2, and PCIe 2.0 x16_4 slots for 3-way SLI, and the three slots will work at x8, x8 and x16 link respectively; the PCIe 2.0 x16_1, PCIe 2.0 x16_4 slots for two-way SLI, and both slots will work at x16 link. • When using NVIDIA® CUDA™ Technology with a Quadro™ series graphics card and Tesla™ series computing processor cards, install the Quadro™ graphics card to PCIe 2.0 x16_1 slot and the Tesla™ computing processor cards to PCIe 2.0 x16_2, PCIe 2.0 x16_4 and PCIe 2.0 x16_5 slots. • Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2/3 when using multiple graphics cards for better thermal environment. See page 2-30 for details. 2-20 Chapter 2: Hardware information