IBM System x3550 M3 22I/O expansion optionsThe server supports up to two PCI Express slots with different riser cards installed into two riser socketson the system planar (one riser socket supports installation of one riser card). The slot form factors are asfollows:Slot 1: Low-profileSlot 2: Full-height, half-lengthEach slot is implemented using a riser card. Standard models have two riser cards installed, whichprovide a total of two PCI Express 2.0 x16 slots (one slot per riser card). You can replace each standardriser with a riser card with one PCI-X 64-bit/133 MHz slot (or configure this riser card instead of thestandard riser using a special bid or configure-to-order):The following table lists the PCI riser card options.Table 10. PCI riser card optionsPartnumberFeaturecodeDescription Maximumsupported46M1070 5076 IBM System x3550 M3 PCI-Express (1x16) Riser Card 2*46M1071 5077 IBM System x3550 M3 PCI-X Riser Card (one PCI-X 1.0a 64-bit 133 MHz slot) 2* Two 1x16 riser cards are installed in standard modelsThe server has an additional PCI Express slot dedicated to the RAID controller.Network adaptersx3550 M3 supports up to four integrated Gigabit Ethernet ports. Two ports are standard, and two ports canbe added by installing an optional Dual-port Gigabit Ethernet Daughter card. This card uses a dedicatedconnector on the motherboard and does not consume a PCI expansion slot.Integrated NICs have the following features:Broadcom BCM5709 chipTCP Offload Engine (TOE) supportWake on LAN support802.1Q VLAN tagging supportNIC Teaming (Load Balancing and Failover)