Chapter 5. IBM BladeCenter HX5 193
Follow these processor configuration rules:
All installed processors must be identical.
In a 2-node configuration, both two and four processors are supported. That is, each node
can have one or two processors installed. All processors must be identical.
If you only have two processors installed (two processors in a single-node, or one
processor in each node in a 2-node), Xeon 6500 series processors are supported.
However, you cannot add two additional processors later to form a 4-processor system,
because the Xeon 6500 series processors do not support 4-way.
A MAX5 configuration (HX5 server with MAX5 attached) supports one or two installed
processors.
Memory speed in the HX5 depends on the SMI link of the processor (the SMI link speed is
listed in Table 5-12 on page 192 as a GT/s value). It also depends on the limits of the
low-power scalable memory buffers that are used in the HX5:
If the SMI link speed is 6.4 GT/s or 5.86 GT/s, the memory in the HX5 can operate at a
maximum of 978 MHz.
If the SMI link speed is 4.8 GT/s, the memory in the HX5 can operate at a maximum of
800 MHz.
Table 5-12 on page 192 indicates these memory speeds.
If a MAX5 memory expansion blade is installed, the memory in the MAX5 can operate as high
as 1066 MHz, depending on the DIMMs installed. The MAX5 memory speed is independent
of the HX5 memory speed.
For more information about calculating memory speed, see 2.3.1, “Memory speed” on
page 22.
Low-power processors (L)
Xeon L7555 8C
Yes 1.86 GHz Ye s + 2 Yes 24 MB 95 W 5.86 GT/s 978 MHz 978 MHz
Advanced processors (X)
Xeon X6550 8C No 2.0 GHz
Yes + 3 Yes 18 MB 130 W 6.4 GT/s 978 MHz 1066 MHz
Xeon X7542 6C
Yes 2.66 GHz Yes +3 No 18 MB 130 W 5.86 GT/s 978 MHz 978 MHz
Xeon X7550 8C
Yes 2.0 GHz Yes + 3 Yes 18 MB 130 W 6.4 GT/s 978 MHz 1066 MHz
Xeon X7560 8C
Yes 2.26 GHz Ye s + 3 Yes 24 MB 130 W 6.4 GT/s 978 MHz 1066 MHz
a. Intel Turbo Boost technology. The number that is listed is the multiple of 133 MHz by which the processor base
frequency can be increased. For example, if the base frequency is 2.0 GHz and the Turbo value is +2, the
frequency can increase to as high as 2.266 GHz.
b. Intel Hyper-Threading technology.
Processor
model/cores
Scalable
to four
socket
Processor
frequency
Turbo
a
HT
b
L3
cache
Power QPI
speed
HX5
memory
speed
MAX5
memory
speed
Xeon E6510: As shown in Table 5-12, the Xeon E6510 processor does not support scaling
to four sockets, and it does not support the MAX5. This limit is a technical limitation of this
particular processor.
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