See this section to resolve issues related to memory.
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 solution from the power source; then, wait 10
seconds before restarting the solution.
- Make sure that:
No error LEDs are lit on the operator information panel.
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.
After changing or replacing a memory module, memory configuration
is updated accordingly in the Setup Utility.
All banks of memory are enabled. The solution 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 solution is at the minimum
memory configuration.
Reseat the memory modules, and then restart the solution.
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.
Re-enable all memory modules using the Setup utility, and then
restart the solution.
(Trained technician 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.
(Trained technician only) Replace the system board.
Multiple
memory modules in a channel identified as failing
Note: Each
time you install or remove a memory module, you must disconnect the
solution from the power source; then, wait 10 seconds before restarting
the solution.
Complete the following procedure
to solve the problem.
- Reseat the memory modules; then, restart the solution.
- Remove the highest-numbered memory module of those that are identified
and replace it with an identical known good memory module; then, restart
the solution. Repeat as necessary. If the failures continue after
all identified memory modules are replaced, go to step 4.
- Return the removed memory modules, one at a time, to their original
connectors, restarting the solution after each memory module, until
a memory module fails. Replace each failing memory module with an
identical known good memory module, restarting the solution after
each memory module replacement. Repeat step 3 until you have tested
all removed memory modules.
- Replace the highest-numbered memory module of those identified;
then, restart the solution. Repeat as necessary.
- Reverse the memory modules between the channels (of the same processor),
and then restart the solution. If the problem is related to a memory
module, replace the failing memory module.
- (Trained technician 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.
- (Trained technician only) Replace the system board.
Invalid
memory population detected
| Invalid memory population (unsupported DIMM population) detected.
Please verify memory configuration is valid. |
If this warning message appears, complete the following
steps:
- See Memory module installation guidelines to make sure
the present memory module population sequence is supported.
- If the present sequence is indeed supported, see if any of the
modules is displayed as “disabled” in Setup Utility.
- Reseat the module that is displayed as “disabled,” and reboot
the system.
- If the problem persists, replace the memory
module that is displayed as “disabled.”