Lenovo x3550 m4, 7914k7g [11/41] All dimms in all cpu memory channels operate at the same speed which is determined as the lowest value of

Lenovo x3550 m4, 7914k7g [11/41] All dimms in all cpu memory channels operate at the same speed which is determined as the lowest value of
The following rules apply when selecting the memory configuration:
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 cases, all DIMMs operate at
1.5 V.
The maximum number of ranks supported per one 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 server depends on number of CPUs, DIMM
type, rank, and operating voltage as shown in the "Maximum quantity" row in the following table.
All DIMMs in all CPU memory channels operate at the same speed, which is determined as the lowest
value of:
The memory speed supported by the specific CPU.
The lowest of maximum operating speeds for the selected memory configuration that depends
on rated speed, operating voltage, and quantity of DIMMs per channel, as shown under
"Maximum operating speed" section in the following table.
The following table (Parts 1 and 2) shows the characteristics of the supported DIMMs. Tables cells highlighted
with a gray background indicate when the combination of DIMM voltage and the number of DIMMs per
channel still allows the DIMMs to operate at a rated speed.
Table 5. Maximum memory speeds (Part 1: Intel Xeon processor E5-2600 product family - RDIMMs)
Specification RDIMMs
Rank Single rank Dual rank Quad rank
Part numbers 49Y1405 (2 GB)
49Y1406 (4 GB)
49Y1559 (4 GB) 49Y1407 (4 GB)
49Y1397 (8 GB)
49Y1563 (16 GB)
90Y3178 (4 GB)
90Y3109 (8 GB)
00D4968 (16 GB)
49Y1399 (8 GB)
Rated speed 1333 MHz 1600 MHz 1333 MHz 1600 MHz 1066 MHz
Rated voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V
Operating voltage 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V
Maximum quantity* 16 24 24 16 24 24 16 16
Largest DIMM 4 GB 4 GB 4 GB 16 GB 16 GB 16 GB 8 GB 8 GB
Maximum memory
capacity
64 GB 96 GB 96 GB 256 GB 384 GB 384 GB 128 GB 128 GB
Maximum memory
at rated speed
64 GB 64 GB 64 GB 256 GB 256 GB 256 GB 128 GB 64 GB
Maximum operating speed (MHz)
1 DIMM per channel 1333
MHz
1333
MHz
1600 MHz 1333
MHz
1333
MHz
1600 MHz 800
MHz
1066
MHz
2 DIMMs per channel 1333
MHz
1333
MHz
1600 MHz 1333
MHz
1333
MHz
1600 MHz 800
MHz
800 MHz
3 DIMMs per channel NS** 1066
MHz
1066 MHz NS** 1066
MHz
1066 MHz NS** NS**
* Maximum quantity supported is shown for two processors installed. When one processor installed the maximum
quantity supported is a half of shown.
** NS = Not Supported
System x3550 M4 (E5-2600) 11

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