ThreadRipper has 8 memory channels versus 2 for a desktop AMD CPU. It's not an x86 limitation.
"x86" as in the computer architecture, not the ISA. Why do you think they put extra channels instead of just having a single 512-bit bus?
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"x86" as in the computer architecture, not the ISA. Why do you think they put extra channels instead of just having a single 512-bit bus?