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- Nov 16, 2006
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Because we get more and more complaints on this subject:
the memory speed limitation has nothing to do with the motherboards and memory modules.
It's all about the CPU IMC.
This is the official DDR5 support for most of the top Arrow Lake CPUs (Ultra 9 285K, Ultra 7 265K, Ultra 5 245K, etc):
This is the official DDR5 support for most of the top Raptor Lake CPUs (Core i9-14900K, Core i9-13900K, Core i7-13700K, etc):
This is the official DDR5 support for most of the top Alder Lake CPUs (Core i9-12900K, Core i7-12700K, etc):
Anything faster is not guaranteed to run (stable).
As you can see, there is a significant speed limitation in case of 4 memory modules.
Now let's take a look at MSI's flagship MEG Z690 Godlike:
You will notice the same limitation in case of 4 memory modules (single and dual rank both): 4000MHz.
Also be aware of this rule: more memory you have, lower speed you'll get.
So don't expect a great stability above 5600MHz in case of 128 or 192GB memory.
the memory speed limitation has nothing to do with the motherboards and memory modules.
It's all about the CPU IMC.
This is the official DDR5 support for most of the top Arrow Lake CPUs (Ultra 9 285K, Ultra 7 265K, Ultra 5 245K, etc):
This is the official DDR5 support for most of the top Raptor Lake CPUs (Core i9-14900K, Core i9-13900K, Core i7-13700K, etc):
This is the official DDR5 support for most of the top Alder Lake CPUs (Core i9-12900K, Core i7-12700K, etc):
Anything faster is not guaranteed to run (stable).
As you can see, there is a significant speed limitation in case of 4 memory modules.
Now let's take a look at MSI's flagship MEG Z690 Godlike:
You will notice the same limitation in case of 4 memory modules (single and dual rank both): 4000MHz.
Also be aware of this rule: more memory you have, lower speed you'll get.
So don't expect a great stability above 5600MHz in case of 128 or 192GB memory.
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