> Is there any reason you're locked into Xeon/FB-DIMM? SuperMicro makes > many rather nice Opteron boards, with good ol' DDR SDRAM. And there > aren't many areas where Xeon outperforms Opteron these days, if any. This is especially true in multi-processor setups. Intel uses an SMP setup with a single I/O controller for the memory which means that only 1 processor can be accessing memory at a time. AMD uses a NUMA architecture with a dedicated I/O controller for each processor. j