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For more information about the features of the Xeon processors, go to:
Intel server processors:
http://www.intel.com/products/server/processors/index.htm?iid=proces
s+server
Intel Xeon processor 7000 sequence:
http://www.intel.com/products/processor/xeon7000/index.htm?iid=servp
roc+body_xeon7000subtitle
For more information about Intel 64 architecture, see:
http://www.intel.com/technology/intel64/index.htm
1.8 Memory subsystem
The standard x3850 M2 and x3950 M2 models have either 4 GB or 8 GB of RAM
standard, implemented as four or eight 1 GB DIMMs.
Memory DIMMs are installed in the x3850 M2 and x3950 M2 using memory
cards, each card has eight DIMM sockets. The server supports up to four
memory cards, giving a total of up to 32 DIMM sockets.
Some models have two memory cards, others have all four cards as standard.
Using 8 GB DIMMs in every socket, the server can hold 256 GB of RAM. With
four nodes, the combined complex can hold up to 1 TB RAM.
With a multinode configuration, the memory in all nodes is combined to form a
single coherent physical address space. For any given region of physical
memory in the resulting system, certain processors are
than other processors. Conversely, for any processor, some memory is
considered
table ensures that memory is used in the most optimal way.
The memory is two-way interleaved, meaning that memory DIMMs are installed
in pairs. Figure 1-12 on page 28 shows eight ports from the Hurricane 4 memory
controller to memory, with each supporting up to 4.26 GBps read data transfers
and 2.13 GBps write data transfers.
The DIMMs operate at 533 MHz, to be in sync with a front-side bus. However the
DIMMs are 667 MHz PC2-5300 spec parts because they have better timing
parameters than the 533 MHz equivalent. The memory throughput is 4.26 GBps,
or 533 MHz x 8 bytes per memory port for a total of 34.1 GBps with four memory
cards.
local
and other memory is
closer
to the memory
remote
. The system's partition descriptor
Chapter 1. Technical overview
39
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