CMOS memory size mismatch

Memory has recently been added or removed from computer

It is normal for a computer to report a memory size mismatch or memory error when memory has been added or removed from the computer. When this error is encountered, enter CMOS and ensure the settings for the memory are properly set and then save and exit from CMOS.

Computer memory

Memory settings improperly set in CMOS

CMOS can become corrupt or reset the memory settings back to the factory default settings. Enter the computer CMOS Setup and make sure the CMOS memory settings are properly set for the amount of memory you have in the computer.

Issue with computer memory or motherboard

If the CMOS settings are properly set for the amount of memory you have in the computer and the issue persists, you may have a memory confliction with incompatible memory. If memory has been recently added to the computer, remove that memory to see if the issue resolves itself.

If removing the memory fixes the problem we suggest trying different memory in the computer or remove the old memory and only use the new memory.

If the issue persists, there may be an issue with the computer memory or motherboard may be present and it is recommended you contact the computer or memory manufacturer.

Additional information

  • See our CMOS definition for further information and related links on this term.