Plugging rules for memory in the 8408-44E or 8408-E8E system

Find information about the configurations and rules that apply to memory for the 8408-44E or 8408-E8E system. This information helps you to install memory in the system.

Figure 1 shows the locations of the memory for the 8408-44E or 8408-E8E system and Table 1 provides information about the plugging rules for the memory in the 8408-44E or 8408-E8E system.
Figure 1. Memory locations in the 8408-44E or 8408-E8E system
Memory locations in the 8408-44E or 8408-E8E system.
The following table lists the feature codes of memory that are supported on the 8408-44E or 8408-E8E system:
Supported feature codes (FC) Size
FC EM86 16 GB CDIMM DDR3
FC EM87 32 GB CDIMM DDR3
FC EM88 64 GB CDIMM DDR3
FC EM8P 16 GB CDIMM DDR4
FC EM8Q 32 GB CDIMM DDR4
FC EM8R 64 GB CDIMM DDR4
FC EM8S 128 GB CDIMM DDR4
Note: To determine if your memory cards have the same feature code, compare the part numbers of the memory cards that are installed in the system to the memory cards being installed. If you need more help, contact your next level of support.
Notes:
  • The 8408-44E or 8408-E8E system supports memory of 16 GB, 32 GB, 64 GB, and 128 GB.
  • Memory pairs must be identical and can be different from the other pairs of memory.
  • The 8408-44E or 8408-E8E system with 2 processors installed has 16 available memory slots.
  • The 8408-44E or 8408-E8E system with 3 processors installed has 24 available memory slots.
  • The 8408-44E or 8408-E8E system with 4 processors installed has 32 available memory slots.
  • The mixing of DDR3 and DDR4 memory in the system is not allowed.
  • The DDR4 memory modules must be at the correct firmware level. If the incorrect firmware level is used, the system will not start. To download firmware updates, software updates, and fixes, see the Fix Central website.
  • To run DDR4 memory, install fully populated memory voltage regulator modules.
Table 1. Memory plugging sequence for 8408-44E or 8408-E8E system
Number of system processors Plugging sequence
Two system processors
  1. Install the first memory pair at location C16 and C17.
  2. Install the second memory pair at location C24 and C25.
  3. Install the third memory pair at location C12 and C13.
  4. Install the fourth memory pair at location C20 and C21.
  5. Install the fifth memory pair at location C14 and C15.
  6. Install the sixth memory pair at location C22 and C23.
  7. Install the seventh memory pair at location C10 and C11.
  8. Install the eighth memory pair at location C18 and C19.
Three system processors
  1. Install the first memory pair at location C16 and C17.
  2. Install the second memory pair at location C24 and C25.
  3. Install the third memory pair at location C32 and C33.
  4. Install the fourth memory pair at location C12 and C13.
  5. Install the fifth memory pair at location C20 and C21.
  6. Install the sixth memory pair at location C28 and C29.
  7. Install the seventh memory pair at location C14 and C15.
  8. Install the eighth memory pair at location C22 and C23.
  9. Install the ninth memory pair at location C30 and C31.
  10. Install the tenth memory pair at location C10 and C11.
  11. Install the eleventh memory pair at location C18 and C19.
  12. Install the twelfth memory pair at location C26 and C27.
Four system processors
  1. Install the first memory pair at location C16 and C17.
  2. Install the second memory pair at location C24 and C25.
  3. Install the third memory pair at location C32 and C33.
  4. Install the fourth memory pair at location C40 and C41.
  5. Install the fifth memory pair at location C12 and C13.
  6. Install the sixth memory pair at location C20 and C21.
  7. Install the seventh memory pair at location C28 and C29.
  8. Install the eighth memory pair at location C36 and C37.
  9. Install the ninth memory pair at location C14 and C15.
  10. Install the tenth memory pair at location C22 and C23.
  11. Install the eleventh memory pair at location C30 and C31.
  12. Install the twelfth memory pair at location C38 and C39.
  13. Install the thirteenth memory pair at location C10 and C11.
  14. Install the fourteenth memory pair at location C18 and C19.
  15. Install the fifteenth memory pair at location C26 and C27.
  16. Install the sixteenth memory pair at location C34 and C35.