HP ProDesk 680 G6 PCI Micro Maintenance and Service Guide - Page 79

Solving memory problems

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Solving memory problems If you encounter memory problems, some common causes and solutions are listed in these tables. IMPORTANT: Power can still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a memory module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the computer will not boot the operating system. NOTE: The memory count will be affected by configurations with the Management Engine (ME) enabled. The ME uses 8 MB of system memory in single-channel mode or 16 MB of memory in dual-channel mode to download, decompress, and execute the ME firmware for Out-of-Band (OOB), third-party data storage, and other management functions. System will not boot or does not function properly after installing additional memory modules Use this information to troubleshoot the computer. Cause A memory module is not installed in the DIMM1 or XMM1 socket. Memory module is not the correct type or speed grade for the system, or the new memory module is not seated properly. Solution Verify that a memory module is installed in the DIMM1 or XMM1 socket on the system board. This socket must be populated with a memory module. Replace module with the correct industry-standard device for the computer. On some models, ECC and non-ECC memory modules cannot be mixed. Out of memory error Use this information to troubleshoot the computer. Cause You have run out of memory to run the application. Solution Check the application documentation to determine the memory requirements. Memory count during POST is wrong Use this information to troubleshoot the computer. Cause The memory modules might not be installed correctly. Integrated graphics might use system memory. Solution Check that the memory modules have been installed correctly and that proper modules are used. No action required. ENWW Solving memory problems 71

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Solving memory problems
If you encounter memory problems, some common causes and solutions are listed in these tables.
IMPORTANT:
Power can still be supplied to the DIMMs when the computer is turned off (depending on the
Management Engine (ME) settings). To avoid damage to the DIMMs or the system board, you must unplug the
computer power cord before attempting to reseat, install, or remove a memory module.
For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise,
the computer will not boot the operating system.
NOTE:
The memory count will be affected by configurations with the Management Engine (ME) enabled. The
ME uses 8 MB of system memory in single-channel mode or 16 MB of memory in dual-channel mode to
download, decompress, and execute the ME firmware for Out-of-Band (OOB), third-party data storage, and other
management functions.
System will not boot or does not function properly after installing additional memory
modules
Use this information to troubleshoot the computer.
Cause
Solution
A memory module is not installed in the DIMM1 or XMM1 socket.
Verify that a memory module is installed in the DIMM1 or XMM1
socket on the system board. This socket must be populated with a
memory module.
Memory module is not the correct type or speed grade for the
system, or the new memory module is not seated properly.
Replace module with the correct industry-standard device for the
computer. On some models, ECC and non-ECC memory modules
cannot be mixed.
Out of memory error
Use this information to troubleshoot the computer.
Cause
Solution
You have run out of memory to run the application.
Check the application documentation to determine the memory
requirements.
Memory count during POST is wrong
Use this information to troubleshoot the computer.
Cause
Solution
The memory modules might not be installed correctly.
Check that the memory modules have been installed correctly and
that proper modules are used.
Integrated graphics might use system memory.
No action required.
ENWW
Solving memory problems
71