IBM System x3250 M4 19I/O expansion optionsThe server offers two PCI Express slots (one x4 and one x8). The slot form-factors are:Slot 1: PCIe 3.0 x4 (for use only by compact adapters such as the ServeRAID BR10il v2 or H1110controllers or the Broadcom NetXtreme Dual Port Ethernet Compact Adapter)Slot 2: PCIe 3.0 x8, full-height, half-length (PCIe 2.0 in models with processors announcedSeptember 2011 - see Table 4)Network adaptersThe x3250 M4 offers two integrated Gigabit Ethernet ports. One port is shared with IntegratedManagement Module (IMM).The Integrated NICs have the following features:Intel 82574L chipTCP/UDP, IPv4, and IPv6 checksum offloadsTCP Segmentation/Transmit Segmentation Offloading (TSO)Wake on LAN support802.1Q VLAN tagging supportSupport for jumbo frames up to 9 KBytesNIC Teaming (Load Balancing and Failover) with Intel PROSet softwareThe Broadcom NetXtreme Dual Port Ethernet Compact Adapter, SBB 90Y5381, feature code A1R5, isdesigned to fit in Slot 1 of the x3250 M4 server, thereby freeing up the PCIe x8 slot for other purposes.Use this adapter when you don't have the ServeRAID BR10il v2 or H1110 controller configured as itoccupies the same slot. The Broadcom NetXtreme Dual Port Ethernet Compact Adapter is available CTOor special bid only and has these features:Broadcom 5718 ASICFull-duplex (FDX) capabilityIEEE 802.3x FDX flow controlI/O virtualization support for VMware NetQueue and Microsoft VMQFunction Level Reset (FLR)IPv4/IPv6 offload: TCP, IP, and UDP checksum offloadLarge send offload (LSO)TCP segmentation offload (TSO)Receive side scaling (RSS)Transmit-side scaling (TSS)IEEE 802.1Q VLAN taggingVLAN insertion and extractionJumbo frames up to 9,600 bytesNIC Teaming (Load Balancing and Failover) with other Broadcom NX or NX2 adaptersWake On LAN supportMessage Signal Interrupt (MSI-X) supportNote: TCP Offload Engine (TOE) is not supported by the Broadcom NetXtreme Dual Port EthernetCompact Adapter.