Memory Options - IBM System x3550 M3 Product Manual

Table 4. Processor options (part 2)
Part Feature Description
number code
Intel Xeon 5500 series processors
59Y4001* 4595 Intel Xeon E5503 2C 2.0 GHz 4 MB Cache 800 MHz 80 w (with fan)
59Y3960 7697 Intel Xeon E5504 4C 2.0 GHz 4 MB L3 Cache 800 MHz 80 w (with fan)
59Y3954 7731 Intel Xeon E5506 4C 2.13 GHz 4 MB L3 Cache 800 MHz 80 w (with fan)
59Y4002* 4596 Intel Xeon E5507 4C 2.26 GHz 4 MB Cache 800 MHz 80 w (with fan)
59Y3961* 7745 Intel Xeon E5520 4C 2.26 GHz 8 MB L3 Cache 1066 MHz 80 w (with fan)
59Y3956* 7732 Intel Xeon E5530 4C 2.4 GHz 8 MB L3 Cache 1066 MHz 80 w (with fan)
59Y3963 7698 Intel Xeon E5540 4C 2.53 GHz 8 MB L3 Cache 1066 MHz 80 w (with fan)
59Y3957* 7699 Intel Xeon X5550 4C 2.66 GHz 8 MB L3 Cache 1333 MHz 95 w (with fan)
59Y3958* 7696 Intel Xeon X5560 4C 2.8 GHz 8 MB L3 Cache 1333 MHz 95 w (with fan)
59Y3959* 7733 Intel Xeon X5570 4C 2.93 GHz 8 MB L3 Cache 1333 MHz 95 w (with fan)
* Withdrawn from marketing

Memory options

IBM DDR3 memory is compatibility tested and tuned for optimal System x performance and throughput.
IBM memory specifications are integrated into the light path diagnostics for immediate system
performance feedback and optimum system uptime. From a service and support standpoint, IBM memory
automatically assumes the IBM system warranty, and IBM provides service and support worldwide.
The server has 18 DIMM slots. When one processor is installed, then only nine DIMM slots can be used.
When two processors are installed, then all 18 DIMM slots can be used. However, the maximum amount
of DIMMs that can be installed is also limited by the type and rank of DIMM used, as follows:
RDIMMs

Up to 18 single-rank RDIMMs (nine per processor) for a maximum of 72 GB (18x 4 GB)

Up to 18 dual-rank RDIMMs (nine per processor) for a maximum of 288 GB (18x 16 GB)

Up to 12 quad-rank RDIMMs (six per processor) for a maximum of 192 GB (12x 16 GB)

UDIMMs

Up to 12 dual-rank UDIMMs (six per processor) for a maximum of 48 GB (12x 4 GB)

Each CPU has three memory channels, and there are three DIMMs per channel. RDIMMs can be
populated three per channel. However, UDIMMs can only be populated two DIMMs per channel. That is,
you can have up to 18 RDIMMs installed in the server, but only up to 12 UDIMMs. Mixing UDIMMs and
RDIMMs is not supported.
Maximum memory speed is limited by memory speed supported by the specific CPU (that is, if the CPU
only supports 1066 MHz, then the memory speed cannot exceed 1066 MHz in any case) and by the
number and type of DIMMs installed (whatever is lower), as follows:
IBM System x3550 M3
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