The OWC 2013 Mac Pro CPU upgrade program will go live the week of 24 March.
MPG has been running the 8-core 3.3 GHz CPU in the 2013 Mac Pro for about ten days now, an upgrade by OWC from the 4-core model.
As the graph shows, the fastest CPU is the 8-core 3.3 GHz (green line), though the 6-core 3.7 GHz is about the same for most tasks (but falls two cores short and is not offered by Apple). The 6-core 3.5 GHz CPU is excellent, but just a notch slower than both of those two faster siblings—not enough to matter for most users, only those needing the last increment of speed. Discussion.