I have a server motherboard with two sockets that support triple-channel memory. Each processor has 6 DIMMs. If I plan to use both CPUs, should I populate at least three of the DIMMs on each processor? Or can I only populate 3 of the DIMMs for the first CPU? Would the 2nd CPU be used in this scenario?
"In computing, symmetric multiprocessing (SMP) involves a multiprocessor computer hardware architecture where two or more identical processors are connected to a single shared main memory"
Non-Uniform Memory Access
However CPU chips have several levels of cache (which is also memory) and NUMA allows for processors to each have access to their own memory.
I believe AMD's HyperTransport and Intel's QuickPath Interconnect allow for NUMA on certain CPUs.