this post was submitted on 30 May 2024
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in other words, the cpu
For most intents and purposes
SoC is from the embedded system development world - as more and more coprocessors were being put into the same chip to consolidate board space and power efficiency, it wasn’t “just” a cpu - it had the CPUs, GPUs, DSPs, and other coprocessors in one
x86 has moved a lot closer to this architecture over the years, but you still generally have a separate chipset controller on the motherboard the CPU interfaces with
laptops all have pretty much an x86 soc. separation between cpu and chipset nowadays happens only on desktops for some reason.
The reason is flexibility, the board manufacturer can decide how many PCIe lanes to send where, how many USB ports there's going to be etc. Modern mainboards are a power delivery system and IO backplane.
this makes sense but can't it be done with integrated chipsets too?
Yeah but then you can't switch out the chipset without having a different CPU skew and probably also socket because changing IO without changing up pins doesn't sound like a good idea. People would barely notice the additional sockets with Intel but we don't want to take Intel as a benchmark there, do we.