Product guide

IBM System x3500 M4 17
The following rules apply when selecting the memory configuration:
The server supports UDIMMs, RDIMMs, and LRDIMMs.

Mixing different types of memory (UDIMMs, RDIMMs, and LRDIMMs) is not supported.

Mixing 1.5 V and 1.35 V DIMMs in the same server is supported. In such a case all DIMMs operate at

1.5 V.
The maximum number of ranks per channel is eight (with the exception of Load Reduced DIMMs,

where more than eight ranks are supported because one quad-rank LRDIMM provides the same
electrical load on a memory bus as a single-rank RDIMM).
The maximum quantity of DIMMs that can be installed in a server depends on the number of CPUs,

DIMM type, rank, and operating voltage, as shown in the "Max. qty supported" row in Table 5.
All DIMMs in the server operate at the same speed, which is determined as the lowest value of:

Memory speed supported by specific CPU

Lowest maximum operating speed for the selected memory configuration that depends on rated

speed, operating voltage, and quantity of DIMMs per channel, as shown in the "Max. operating
speed" section in Table 5
Table 5. Maximum memory speeds (Part 1: Intel Xeon processor E5-2600 v2 product family - RDIMMs)
DIMM specification RDIMM
Rank Single rank Dual rank
Part numbers 00D5024 (4 GB)
00D5036 (8 GB)
00D5044 (8 GB) 00D5028 (4 GB)
00D5048 (16 GB)
Rated speed 1600 MHz 1600 MHz 1866 MHz
Rated voltage 1.35 V 1.35 V 1.5 V
Operating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.5 V
Max qty supported* 24 24 24 24 24
Max DIMM capacity 8 GB 8 GB 8 GB 8 GB 16 GB
Max memory capacity 192 GB 192 GB 192 GB 192 GB 384 GB
Max. memory at rated speed None 128 GB None 128 GB 128 GB
Maximum operating speed
1 DIMM per channel 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1866 MHz
2 DIMMs per channel 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1600 MHz
3 DIMMs per channel 800 MHz 1066 MHz 800 MHz 1066 MHz 1066 MHz
* The maximum quantity that is supported is shown for two processors installed.