AnandTech heard at Computex that performance issues have pushed back the launch of AMD's desktop Bulldozer processors to late July:
Just above Llano we will have the long awaited Bulldozer CPU. AMD originally wanted to launch Bulldozer at Computex but performance issues with its B0 and B1 stepping chips pushed back the launch. Now we're looking at a late July launch with B2 silicon, but performance today is a big unknown. Apparently the performance of B1 stepping silicon doesn't look too good.
X-bit Labs on the other hand came across information that AMD's Zambezi may not enter production until August 2011, with actual retail availability slated for September 2011.
The potential delay of Zambezi to September will be another postponement in a long row of Bulldozer set-backs. Initially, the company wanted to make Bulldozer micro-architecture powered chips using 45nm SOI process technology, but it was not economically feasible. As a result, AMD had to stick to 32nm SOI fabrication process, which turned out to be problematic for its partner Globalfoundries. The latter even had to reconsider its agreements with AMD under which the latter pays only for working dies, not wafers that contain potentially faulty chips.
Guess we'll have to wait to see which information is right.