Originally Posted by mdbrotha03
So how does the Processor and everything that is package with it interface with the rest of the system?
The CPU die talks to DDR3 memory directly over memory IO, PCI-E devices talk directly to the NB die, and NB talks to the PCH (which is just a glorified southbridge) through DMI,
Just as in Bloomfield where, the CPU talks directly to memory, PCI-E devices directly to talk to the NB, and the NB talks to the SB through DMI.
Use some rational thinking, all DMI provides is 2 GB/s. You think a processor talks to the rest of the system over a 2 GB/s connection?
A system bus is what connects the CPU to the rest of the system. DMI is not doing that. What comes out of the CPU die is a QPI connection to the NB (the rest of the system), and Memory IO to talk to the memory. So for Lynnfield, the system interface is QPI.
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