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The x3550 M5 Thermal Kit, part number 00KA059, contains two fans. It provides the seventh and eighth

system fans needed for the following options when only one processor is installed:

Intel X540 ML2 Dual Port 10GbaseT Adapter

QLogic 8200 Dual Port 10GbE SFP+ VFA

io3 Enterprise Flash Adapters

io3 Enterprise Value Flash Adapters

io3 Enterprise Mainstream Flash Adapters

P3700 NVMe Enterprise Performance Flash Adapters

The x3550 M5 Thermal Kit is not needed if two processors are installed, because the second processor

includes these fans.

The COM Port Bracket, part number 00KA161, is used for mounting the external serial port on the rear of

the x3550 M5. This option includes the bracket and the cable. The COM Port option is mounted in place of

the PCIe slot 3, and only PCIe slots 1 and 2 remain available.

The following table lists the x3550 M5 Thermal Kit and COM Port Bracket part numbers.

Table 15. Miscellaneous options

Part

Feature

Description

number

code

00KA059

A5AJ

System x3550 M5 Thermal Kit

00KA161

A5AN

COM Port Bracket

Network adapters

The x3550 M5 supports four integrated Gigabit Ethernet ports.

The integrated network interface controller (NIC) has the following features:

A Broadcom BCM5719 chip

Four Gigabit Ethernet ports

NIC Teaming (load balancing and failover)

Ethernet features:

Compliant with 1 Gb Ethernet IEEE 802.3, 802.3u, and 802.3ab PHY specifications

Integrated PHY for 10/100/1000 Mbps for multispeed, full, and half-duplex auto-negotiation

Automatic MDI crossover

IEEE 802.3x-compliant flow control support

IEEE 1588 protocol and 802.1AS time synchronization implementation

IEEE802.3az - Energy Efficient Ethernet (EEE)

I/O Virtualization features:

I/O Virtualization support for VMware NetQueue and Microsoft virtual machine queue (VMQ)

Function Level Reset (FLR)

IEEE 802.1q Virtual Local Area Network (VLAN) tagging support

Stateless offload and performance features:

TCP, IP, and User Datagram Protocol (UDP) checksum offload

TCP segmentation offload (TCO)

Large Send Offload (LSO)

Receive Side Scaling (RSS) and Transmit Side Scaling (TSS)

Message Signal Interrupt (MSI) and Message Signal Interrupt Extension (MSI-X) support

Support for jumbo frames up to 9600 bytes

Lenovo System x3550 M5

Maximum

supported