According to eWeek, G3MX will allow next-gen Opteron-based servers to address 16 memory modules per core instead of eight. For instance, a G3MX-based server powered by two quad-core Opterons should be able to juggle as many as 128 DIMMs for a total of 256GB or even 512GB of RAM. G3MX tech also supports DDR3 memory.
AMD says G3MX technology is scheduled to roll out in 2009. It'll show up around the time AMD "introduces its next-generation architecture enhancements," the company says.