Up until about a month ago, AMD's dual core roadmap called for the Opteron series to launch in late April, with the desktop dual core product line following in late 2005. The reasoning behind this was simple; workstation and server markets would benefit immediately from dual core, while desktop performance enhancements would be more situational and program dependent. Given AMD's relatively limited production capacity, it made sense to push into the smaller volume / higher margin areas first, and bring up the desktop capacity later in the year, similar to how Sunnyvale originally transitioned to the Athlon 64 from the AthlonXP / MP.