Lenovo ThinkAgile VX3720 Product Manual - Page 9

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Memory

The ThinkAgile VX3320 appliances support Lenovo TruDDR4 memory. TruDDR4 memory uses the highest-

quality components sourced from Tier 1 DRAM suppliers and only memory that meets strict requirements is

selected. It is compatibility tested and tuned to maximize performance and reliability.

The VX3320 supports up to 24 DIMMs. The following rules apply when selecting the memory configuration:

The appliance supports RDIMMs, LRDIMMs, or 3DS RDIMMs; mixing different types of memory

(RDIMMs, LRDIMMs, and 3DS RDIMMs) is not supported.

All DIMMs in the appliance must be of the same type and capacity.

All DIMMs in the appliance operate at the same speed up to 2666 MHz, which is determined by the

maximum memory speed supported by the specific processor.

Note: Maximum memory speed can be achieved when Max performance mode is enabled in UEFI.

The following maximum memory capacities supported by the appliance:

RDIMMs: 768 GB (384 GB per processor).

LRDIMMs: 1.5 TB (768 GB per processor).

3DS RDIMMs: 3 TB (1.5 TB per processor).

The following memory protection technologies are supported:

ECC

SDDC (for x4-based memory DIMMs)

ADDDC (for x4-based memory DIMMs; Gold and Platinum processors only)

Patrol scrubbing

Demand scrubbing

Single Device Data Correction (SDDC) works only in the independent channel mode (the default operational

mode) and supports only x4-based memory DIMMs.

Adaptive Double Device Data Correction (ADDDC) works with x4-based memory DIMMs and requires two

DIMM ranks per channel, Intel Xeon Gold or Platinum processors, and the Closed Page memory access mode.

The following table lists the memory options that are available for selection.

Table 6. Memory options

Description

RDIMMs

ThinkSystem 8GB TruDDR4 2666 MHz (1Rx8 1.2V) RDIMM

ThinkSystem 16GB TruDDR4 2666 MHz (1Rx4 1.2V) RDIMM

ThinkSystem 16GB TruDDR4 2666 MHz (2Rx8 1.2V) RDIMM

ThinkSystem 32GB TruDDR4 2666 MHz (2Rx4 1.2V) RDIMM

LRDIMMs

ThinkSystem 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM

3DS RDIMMs

ThinkSystem 128GB TruDDR4 2666 MHz (8Rx4 1.2V) 3DS RDIMM

* The quantity shown is with one processor / two processors.

Lenovo ThinkAgile VX3320 Appliance (Xeon SP Gen 1) (withdrawn product)

Part

Feature

number

code

Quantity*

7X77A01301 AUU1

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24

7X77A01302 AUNB

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24

7X77A01303 AUNC

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24

7X77A01304 AUND

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24

7X77A01305 AUNE

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24

7X77A01307 AUNF

4, 6, 8, 12 /

4, 6, 8, 12, 16, 24