Memory options
The x3850 X6 (6241) supports either DDR3 or TruDDR4 memory, depending on the Compute Books used
in the server.
Lenovo TruDDR4 Memory uses the highest quality components that are sourced from Tier 1 DRAM
suppliers and only memory that meets the strict requirements of Lenovo is selected. It is compatibility
tested and tuned to maximize performance and reliability. TruDDR4 Memory has a unique signature that is
programmed into the DIMM that enables System x® servers to verify whether the memory that is installed
is qualified or supported by Lenovo. Because TruDDR4 Memory is authenticated, certain extended
memory performance features can be enabled to extend performance over industry standards.
Lenovo DDR3 memory is compatibility tested and tuned for optimal System x performance and
throughput. Lenovo memory specifications are integrated into the light path diagnostics for immediate
system performance feedback and optimum system uptime.
From a service and support standpoint, Lenovo TruDDR4 and DDR3 memory automatically assumes the
system warranty, and Lenovo provides service and support worldwide.
The x3850 X6 supports TruDDR4 memory operating at speeds up to 1866 MHz and DDR3 memory at
speeds up to 1600 MHz. Note that even though supported TruDDR4 DIMMs are rated at 2400 MHz or
2133 MHz, when used in the x3850 X6, they operate at speeds up to 1866 MHz.
The x3850 X6 supports up to 96 DIMMs when all processors are installed, 24 DIMMs per processor. Each
processor has four memory channels that are implemented using Scalable Memory Interface generation 2
(SMI2) chips, and the server implements three DIMMs per channel. The processor and the corresponding
memory DIMM slots are on the Compute Book.
The following table lists the memory options that are available for x3850 X6.
Table 6. Memory options
Part
number
Feature
code Description
Maximum
supported
Models
where used
2400 MHz TruDDR4 RDIMMs and LRDIMMs (for use with E7 v4 processors)
46W0821 ATC8 8GB TruDDR4 Memory (1Rx4, 1.2V)
PC4-19200 CL17 2400MHz LP RDIMM
96 (24 per CPU) 14x
46W0829 ATCA 16GB TruDDR4 Memory (2Rx4, 1.2V)
PC4-19200 CL17 2400MHz LP RDIMM
96 (24 per CPU) All other v4 models
46W0833 ATCB 32GB TruDDR4 Memory (2Rx4, 1.2V)
PC4-19200 CL17 2400MHz LP RDIMM
96 (24 per CPU) 8Cx, 8Fx, 8Hx, 8Jx
46W0841 ATGG 64GB TruDDR4 Memory (4Rx4, 1.2V)
PC4-19200 CL17 2400MHz LP LRDIMM
96 (24 per CPU) -
00YG941 B0MV 128GB TruDDR4 Memory (8Rx4 1.2V)
PC4-2400-R 2400MHz 3DS RDIMM
96 (24 per CPU) -
2133 MHz TruDDR4 RDIMMs and LRDIMMs (for use with E7 v3 processors, also supported with E7 v4;
00KH391 only supported on certain E7 v3 processors)
46W0788 A5B5 8GB TruDDR4 Memory (1Rx4, 1.2V)
PC4-17000 CL15 2133MHz LP RDIMM
96 (24 per CPU) D5x
46W0796 A5B7 16GB TruDDR4 Memory (2Rx4, 1.2V)
PC4-17000 CL15 2133MHz LP RDIMM
96 (24 per CPU) F2x, F4x, G2x,
G4x
95Y4808 A5UJ 32GB TruDDR4 Memory (2Rx4, 1.2V)
PC4-17000 CL15 2133MHz LP RDIMM
96 (24 per CPU) -
00KH391† AUF3 32GB TruDDR4 Memory (4Rx4, 1.2V)
PC4-17000 CL15 2133MHz LP LRDIMM
96 (24 per CPU) -
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