Hello Everyone :
For those who are interested , I finally verified and documented the identity of the "Quasi Northbridge" chips used in the Mac Pro 4,1 (factory 2009) .
Here is an actual picture of the AC82X58 IOH "Quasi Northbridge" die from a Mac Pro 4,1 (2009 factory) single CPU Tray . It is a X58 :
And here is an actual picture of the AC5520 IOH "Quasi Northbridge" die from a Mac Pro 4,1 (2009 factory) dual CPU Tray . It is a 5520 :
For those who are interested , I finally verified and documented the identity of the "Quasi Northbridge" chips used in the Mac Pro 4,1 (factory 2009) .
Here is an actual picture of the AC82X58 IOH "Quasi Northbridge" die from a Mac Pro 4,1 (2009 factory) single CPU Tray . It is a X58 :
And here is an actual picture of the AC5520 IOH "Quasi Northbridge" die from a Mac Pro 4,1 (2009 factory) dual CPU Tray . It is a 5520 :
