Kann ich unterschiedliche Speichermodule in meinem prozessorbasierten AMD-System verwenden?

Article Number: 0021

Issue Description:
Multiple memory modules are installed in the system, but the motherboard’s BIOS and / or the operating system does not recognize:

  • The memory to be working in dual channel mode
  • The full amount of memory installed
  • The memory to be working at its specified speed

Troubleshooting Tips:
The following troubleshooting suggestions can help resolve memory misidentification issues that occur.

Check for memory and motherboard compatibility:
If the memory has not been qualified by the motherboard manufacturer, it may not be compatible with the motherboard. Most motherboard manufacturers provide a Qualified Vendor List (QVL), which describes the size, vendor, model and brand of memory modules that have been tested to work with the motherboard. Since each motherboard is different and the QVL can differ between each motherboard:

  • Refer to the motherboard’s manual or manufacturer’s website to verify that the memory is listed on the QVL for the specific motherboard used
  • For optimum compatibility,  use the same brand, model, speed and specifications of memory when using multiple memory modules
  • Verify that the motherboard’s BIOS version supports the memory and / or download and install any necessary BIOS updates

Verify proper installation/configuration of the memory:
Although the memory may be compatible with the motherboard, improper configuration can prevent the memory from working at its full potential. Since each motherboard differs in the amount of memory slots and channels available, the motherboard manufacturer provides specific instructions on how to set up one or more memory modules for optimum performance.

  • Refer to the motherboard’s manual to obtain instructions on the best method for installing/configuring memory

Match memory speed to processor:
Memory cannot perform at a speed higher than the processor. If the speed of the memory is greater than that of the processor, it will decrease its speed to match the speed of the processor.

  • Using memory that performs at a higher speed than the processor will not cause instability, but expect the memory to only perform as fast as the processor
  • Furthermore, if using multiple memory modules that perform at different speeds, all memory modules will only be able to perform at the speed of the lowest memory module. For optimum compatibility,  use the same brand, model, speed and specifications of memory when using multiple memory modules

Verify functionality of the memory:
Misidentification of the memory  can be a result of defective or damaged memory. To ensure each memory module is functioning properly, try one of the following:

  • If using a single memory module:
    • Test the memory module in a different memory slot, referring to the motherboard’s manual to determine which slot(s) can be used for single memory setup
    • Test the memory in another compatible system
    • Try another similar memory module in the system
  • If using multiple memory modules
    • Test each memory module individually in the system, referring to the motherboard’s manual to determine which slot(s) can be used for single memory setup
    • Verify that each module is identified at the correct size and speed
    • For more comprehensive troubleshooting instructions, contact the memory and / or motherboard manufacturer

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