A Familiar Slot Configuration

This looks like it's going to become one of the most popular slot layouts for P55: three PCI Express x16 slots (one wired for x16, one wired for x8 [both drawing from the CPU's PCIe], and one x4 attached to P55), one PCIe x1 slot, and a handful of PCI slots (in this case, three). This arrangement enables full CrossFire and SLI support across a pair of electrically-x8 slots, plenty of second-gen PCIe expansion, and enough lanes left over for integrated extras like Gigabit Ethernet.