This was expected....  I am big fan of AMD processors. For price vs performance, AMD has always been clear winner! 

"The competitive environment has been more intense than we had planned for or understood," said Kevin Rollins, Dell's chief executive, in a statement.

The disclosure, revealed in Dell’s first quarter results, indicated that the PC giant would introduce new servers based on AMD’s Opteron line of 64-bit processors by year’s end. 

Read full article @ Dell embraces AMD processors.