IBM System x3850 X5 11
QPI wrap card
In the x3850 X5, QPI links are used for interprocessor communication both in a single-node system and in
a two-node system. They are also used to connect the system to a MAX5 memory expansion unit. In a
single-node x3850 X5, the QPI links connect in a full mesh between all CPUs. To complete this mesh, the
QPI wrap card is used. QPI wrap cards are installed in sockets where the scalability cables are installed.
The QPI wrap cards are only for single-node configurations with three or four processors installed and
only when a MAX5 unit is not installed. Two QPI wrap cards are needed.
Table 4. QPI wrap card
Part number Feature code Description Maximum
supported
49Y4379 5104 IBM x3850 X5 and x3950 X5 QPI wrap card kit (quantity 2) 1 pair
QPI wrap cards are not necessary for any of the following configurations:
Single-node configurations with two processors
Any configurations with MAX5 memory expansion units
Two-node configurations
MAX5
The IBM MAX5 memory expansion unit is a 1U device and has 32 DDR3 DIMM sockets, two 675-watt
power supplies, and five 40 mm hot-swap speed-controlled fans. It provides added memory and
multinode scaling support for the x3850 X5 server. Some models include the MAX5 standard, as listed in
the Standard Models and Workload-optimized models sections. The MAX5 options are listed in the
following table.
There are two MAX5 options available.
IBM MAX5 for System x
®
, part number 59Y6265 (also known as MAX5 V1)
IBM MAX5 V2 for System x, part number 88Y6529
Both x3850 X5 machine types (7143 and 7145) support both MAX5 options, provided the firmware is at
least UEFI level G0E171T/A. When used with the x3850 X5 machine type 7143 (Intel Xeon E7-4800 and
E7-8800 series processors), MAX5 V2 supports low-voltage (operating at 1.35V DIMMs).
Note that some models and some processors do not support the MAX5. See the model table and the
processor options table for details. The MAX5 V1 includes one power supply. The second power supply is
optional (part 60Y0332) and provides redundancy. The MAX5 V2 includes two power supplies; no
additional power supplies are needed or available.
Table 5. MAX5
Part number Feature
code
Description Maximum
supported
59Y6265 4199 IBM MAX5 for System x 1
88Y6529 A19H IBM MAX5 V2 for System x 1
60Y0332 4782 IBM High Efficiency 675W Power Supply (MAX5 V1 only, 59Y6265) 1
59Y6267 4192 IBM MAX5 to x3850 X5 Cable Kit (quantity of four cables)
(Used to connect one server to one MAX5)
1
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