HP t150 Maintenance & Service Guide: HP MultiSeat 6000 Desktop, HP MultiSe - Page 200
Solving Memory Problems, CAUTION
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Solving Memory Problems If you encounter memory problems, some common causes and solutions are listed in the following table. CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings on some models). 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 DIMM 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: On some models. the memory count will be affected by configurations with the Management Engine (ME) enabled. The ME uses 8MB of system memory in single channel mode or 16MB 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. Table K-12 Solving Memory Problems System will not boot or does not function properly after installing additional memory modules. Cause Solution On Intel systems, A memory module is not installed in the DIMM1 socket. Ensure that a memory module is installed in the black DIMM1 socket on the system board. This socket must be populated with a memory module. Populate DIMM sockets in the following order for Intel systems: DIMM1, DIMM3, DIMM2, DIMM4. On AMD systems, a memory module is not installed in the system board memory socket. The sockets must be populated with at least one memory module. Install memory modules in the following order: XMM4, XMM3, XMM2, XMM1. 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. Cause Memory configuration may not be set up correctly. You have run out of memory to run the application. Solution Use the Device Manager to check memory configuration. Check the application documentation to determine the memory requirements. 190 Appendix K Troubleshooting Hardware