Lenovo ThinkSystem SR630 V3 User Manual page 482

Displayed system memory is less than installed physical memory
Complete the following procedure to solve the problem.
Note: Each time you install or remove a memory module, you must disconnect the server from the power
source; then, wait 10 seconds before restarting the server.
1. Make sure that:
• No error LEDs are lit. See
• No memory module error LEDs are lit on the system board.
• Memory mirrored channel does not account for the discrepancy.
• The memory modules are seated correctly.
• You have installed the correct type of memory module (see
order" on page 56
• After changing or replacing a memory module, memory configuration is updated accordingly in the
Setup Utility.
• All banks of memory are enabled. The server might have automatically disabled a memory bank when
it detected a problem, or a memory bank might have been manually disabled.
• There is no memory mismatch when the server is at the minimum memory configuration.
2. Reseat the memory modules, and then restart the server.
3. Check the POST error log:
• If a memory module was disabled by a systems-management interrupt (SMI), replace the memory
module.
• If a memory module was disabled by the user or by POST, reseat the memory module; then, run the
Setup Utility and enable the memory module.
4. Run memory diagnostics. When you start a server and press the key according to the on-screen
instructions, the LXPM interface is displayed by default. For more information, see the "Startup" section
in the LXPM documentation compatible with your server at
lxpm_frontend/lxpm_product_page.html
the Diagnostic page, go to Run Diagnostic ➙ Memory Test ➙ Advanced Memory Test.
5. Reverse the modules between the channels (of the same processor), and then restart the server. If the
problem is related to a memory module, replace the failing memory module.
6. Re-enable all memory modules using the Setup Utility, and then restart the server.
7. (Trained technicians only) Install the failing memory module into a memory module connector for
processor 2 (if installed) to verify that the problem is not the processor or the memory module connector.
8. (Trained technicians only) Replace the system board.
Invalid memory population detected
If this warning message appears, complete the following steps:
Invalid memory population (unsupported DIMM population) detected. Please verify memory configuration is valid.
1. See "Memory module installation rules and order" on page 56
population sequence is supported.
2. If the present sequence is indeed supported, see if any of the modules is displayed as "disabled" in
Setup Utility.
3. Reseat the module that is displayed as "disabled," and reboot the system.
4. If the problem persists, replace the memory module.
ThinkSystem SR630 V3 User Guide
472
"System LEDs and diagnostics display" on page
for requirements).
. You can perform memory diagnostics with this interface. From
40.
"Memory module installation rules and
https://sysmgt.lenovofiles.com/help/topic/
to make sure the present memory module