4 ms·

So looks we're coming back around to S100-style "motherboards" that were more correctly called "backplanes"; but with PCIe the interconnect instead of basically

So looks we're coming back around to S100-style "motherboards" that were more correctly called "backplanes"; but with PCIe the interconnect instead of basically the CPU pins extended to slots. Interesting these appear to have their own RAM. Similar to how the Pentium slot CPUs had cache RAM on the slot chassis.

wmf 7y ago
RAM (slots) has to be on the same board as the CPU due to signal integrity.
- olliej 7y ago
  also just direct performance - ram speeds these days make line length important (it's why there are some fun swirls in the traces - getting identical timings is important and measurable)