IBM 7915E4G Datasheet download pdf (Page 12)

IBM System x3650 M4 12

The maximum quantity of DIMMs that can be installed in the 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 that is supported by the specific CPU.



Lowest of maximum operating speeds for selected memory configuration that depends on rated



speed, operating voltage, and quantity of DIMMs per channel, as shown under "Max. operating

speed" section in Table 5.

Table 5. Maximum memory speeds

DIMM type

DIMM

specification

UDIMM RDIMM HCDIMM LRDIMM

Rank Dual rank Single rank Dual rank Quad rank Dual rank Quad rank

Rated speed 1333 MHz 1333 MHz 1600

MHz

1333 MHz 1600

MHz

1066 MHz 1333 MHz 1333 MHz

Rated voltage 1.35 V 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V

Operating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V

Max. qty

supported*

16 16 16 24 24 16 24 24 16 16 24 24 24

Max. DIMM

capacity

4 GB 4 GB 4 GB 4 GB 4 GB 16 GB 16 GB 8 GB 8 GB 8 GB 16 GB 32 GB 32 GB

Max. memory

capacity

64 GB 64 GB 64 GB 96 GB 96 GB 256 GB 384 GB 192 GB 128 GB 128 GB 384 GB 768 GB 768 GB

Max. memory

at max. speed

32 GB 64 GB 64 GB 64 GB 64 GB 256 GB 256 GB 128 GB 128 GB 64 GB 384 GB 256 GB 512 GB

Max. operating

speed

_____

______ ______

______

_______ ______

______

_______ ______

______

1 DIMM per

channel

1333

MHz

1333

MHz

1333

MHz

1333

MHz

1600

MHz

1333

MHz

1333

MHz

1600

MHz

800

MHz

1066

MHz

1333

MHz

1333

MHz

1333

MHz

2 DIMMs per

channel

1066

MHz

1333

MHz

1333

MHz

1333

MHz

1600

MHz

1333

MHz

1333

MHz

1600

MHz

800

MHz

800

MHz

1333

MHz

1066

MHz

1333

MHz

3 DIMMs per

channel

NS** NS** NS** 1066

MHz

1066

MHz

NS** 1066

MHz

1066

MHz

NS** NS** 1333

MHz

1066

MHz

1066

MHz

* Maximum quantity supported is shown for two processors installed. When one processor is installed, the

maximum quantity supported is a half of the quantity that is shown. Shaded cells indicate when all DIMM sockets

can be occupied.

** NS = Not Supported

The following memory protection technologies are supported:

ECC



Chipkill (for x4-based memory DIMMs)



Memory mirroring



Memory rank sparing



If memory mirroring is used, DIMMs must be installed in pairs (minimum of one pair per each CPU), and

both DIMMs in a pair must be identical in type and size.

If memory rank sparing is used, then a minimum of one quad-rank DIMM or two single-rank or dual-rank

DIMMs must be installed per populated channel (the DIMMs do not need being identical). In rank sparing

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 38 39

Comments to this Manuals

No comments

IBM 7915E4G Datasheet Page 12

Comments to this Manuals

Related products and manuals for Servers IBM 7915E4G