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The IBM Flex System x240 Compute Node type 8737 features the Intel Xeon E5-2600 series
processors with two, four, six, or eight cores per processor, with up to 16 threads per socket.
The processors have up to 20 MB of shared L3 cache, Hyper-Threading, Turbo Boost
Technology 2.0 (depending on processor model), two QuickPath Interconnect (QPI) links that
run at up to 8 GT/s, one integrated memory controller, and four memory channels supporting
up to three DIMMs each.
The x240 includes 8 GB of memory (2 x 4 GB DIMMs) running at either 1600 MHz or 1333
MHz depending on model. Some models include an Embedded 10 Gb Virtual Fabric Ethernet
LAN-on-motherboard (LOM) controller as standard; this embedded controller precludes the
use of an I/O adapter in I/O connector 1. Model numbers in the form x2x (for example,
8737-L2x) include an Embedded 10 Gb Virtual Fabric Ethernet LAN-on-motherboard (LOM)
controller as standard. Model numbers in the form x1x (for example, 8737-A1x) do not include
this embedded controller.
The x240 with the Intel Xeon E5-2600 series processors can support up to 768 GB of
memory in total when using 32 GB LRDIMMs and with both processors installed. The x240
uses Double Data Rate-3 (DDR-3) low-profile (LP) DIMMs. The x240 supports three types of
DIMM memory:
Registered DIMM (RDIMM) modules
Unbuffered DIMM (UDIMM) modules
Load-reduced (LRDIMM) modules
The mixing of these different memory DIMM types is not supported.
The x240 compute node features an onboard LSI 2004 SAS controller with two small form
factor (SFF) hot-swap drive bays that are accessible from the front of the compute node. The
onboard LSI SAS2004 controller provides RAID 0, RAID 1, or RAID 10 capability and
supports up to two SFF hot-swap SAS or SATA HDDs or two SFF hot-swap solid state drives.
Figure 1-8 shows how the LSI2004 SAS controller and hot-swap storage devices connect to
the internal HDD interface.
LSI2004
SAS
Controller
Figure 1-8 The LSI2004 SAS controller connections to HDD interface
Each x240 server has an Integrated Management Module version 2 (IMMv2) onboard and
uses the Unified Extensible Firmware Interface (UEFI) to replace the older BIOS interface.
Chapter 1. Introduction to IBM Flex Systems and IBM PureSystems offerings
SAS 0
SAS 0
SAS 1
SAS 1
Hot-Swap
Storage
Device 1
Hot-Swap
Storage
Device 2
17
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