Memory module installation rules and order
Memory modules must be installed in a specific order based on the memory configuration that you implement and the number of processors and memory modules installed in the server.
Supported memory types
For information on the types of memory module supported by this server, see Memory section in Technical Specifications.
Information about optimizing memory performance and configuring memory is available at the Lenovo Press website:
In addition, you can take advantage of a memory configurator, which is available at the following site:
Lenovo Enterprise Solutions Configurator (Memory Configurations)
Specific information about the required installation order of memory modules in your server based on the system configuration and memory mode that you are implementing is shown below.
Memory modules and processors layout
The memory-channel configuration table below shows the relationship between the processors, memory controllers, memory channels, and memory module slot numbers.
| Processor | Processor 0 | |||||||||||||||
| Controller | iMC3 | iMC2 | iMC0 | iMC1 | ||||||||||||
| Channel | CH1 | CH0 | CH1 | CH0 | CH0 | CH1 | CH0 | CH1 | ||||||||
| Slot No. | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| DIMM No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Processor | Processor 1 | |||||||||||||||
| Controller | iMC3 | iMC2 | iMC0 | iMC1 | ||||||||||||
| Channel | CH1 | CH0 | CH1 | CH0 | CH0 | CH1 | CH0 | CH1 | ||||||||
| Slot No. | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| DIMM No. | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 |
Memory module installation guideline
The ThinkSystem SR680a V3 supports Memory module installation rules and order.