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IBM’s x3550 M4 is one of the fastest and most powerful 1U Rackable Servers on the market, and along with support for Intel’s E5-2600 Xeons, it continues IBM’s pay-as-you-grow philosophy, allowing businesses to start small and expand Largely only when demand dictates. Their six-core modules with a 15MB L3 cache, a 7.2GT/sec QPI, and offer Hyper-Threading and Turbo Boost. The standard models all ship with four SFF SAS/SATA hot-swap bays, which can be upgraded to eight bays.
This is achieved with a kit comprising a backplane for the four extra bays, to which you must add an IBM ServeRAID M1115 or M5110 controller for the four extra SAS ports. The latter goes into the dedicated PCI Express slot behind the DIMM sockets. Other drive options include three hot-swap LFF drives and a cheaper cold-swap LFF version available as a configure-to-order (CTO) model. IBM’s new IMM2 sees big improvements.
The server supports 1,333MHz memory in the shape of either 64GB of UDIMMs, 384GB of RDIMMs or 768GB of LR-DIMMs. There are 24 DIMM slots flanking the two CPU sockets. There’s a wide range of network options. The x3550 M4 has four embedded Gigabit ports and an extra one for an Emulex dual-port 10GbE mezzanine card, which is better than the HP DL360p Gen8’s single connector that supports HP’s FlexLOM Quad-Gigabit or dual-10GbE cards.