I got this info from CPU Magazine. AMD is falling behind because while AMD is getting out the traditional DDR2 DIMM modules, Intel's going for the new DDR2 and DDR3 FBDIMM technology. It looks like a processor stuck in the middle of the RAM stick creating a fully buffered dual inline memory module!!! It's a higher density, higher performance memory technolgy waiting to be released sometime this year hopefully by Intel.
The advanced high performance DDR2 800MHz FBDIMM technology is the next generation memory module for servers to start out. Well forget about servers. Intel has a partnership to develop this technology too for consumer desktop PCs!!!!