this post was submitted on 25 Feb 2025
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In systems where memory speed are mismatched, the system runs at the slowest module's speed. So literally making the soldered, faster memory slower. Why even have soldered memory at that point?
I'd assume the soldered memory to have a dedicated memory controller. There's also no hard requirement that a single controller can't drive different channels at different speeds. The only hard requirement is that one channel needs to run at one speed.
...and the whole thing becomes completely irrelevant when we're talking about PCIe expansion cards the memory controller doesn't care.