Intel published some documents last week regarding the new E-0 stepping that
would affect mPGA478 2.8A, 2.8E, 3.0E, 3.2E and 3.4E GHz, LGA775 520, 530, 540,
550 and 560 (2.8, 3, 3.2, 3.4, 3.6 GHz) and LGA775 with EM64T 3.2, 3.4 and 3.6
GHz. Apparently, E-0 step will incorporate more power optimizations and NX Bit.
We have also seen that

LGA755 Extreme Edition
will come in M0 stepping but will still be based on
the 0.13 Gallatin core featuring 2MB L3 cache.

• The conversion to E-0 Step will incorporate power optimizations to enable
speed enhancements
o Includes Execute Disable Bit support and additional power management features
(LGA775 only)
o The CPU ID will change from 0xF34h to 0xF41h
o Updated BIOS required
o E-0 is pin compatible with D-0
o Data Sheet available July 14, 2004
• New S-Specs for affected product line items

Intel published some documents last week regarding the new E-0 stepping that
would affect mPGA478 2.8A, 2.8E, 3.0E, 3.2E and 3.4E GHz, LGA775 520, 530, 540,
550 and 560 (2.8, 3, 3.2, 3.4, 3.6 GHz) and LGA775 with EM64T 3.2, 3.4 and 3.6
GHz. Apparently, E-0 step will incorporate more power optimizations and NX Bit.
We have also seen that

LGA755 Extreme Edition
will come in M0 stepping but will still be based on
the 0.13 Gallatin core featuring 2MB L3 cache.

• The conversion to E-0 Step will incorporate power optimizations to enable
speed enhancements
o Includes Execute Disable Bit support and additional power management features
(LGA775 only)
o The CPU ID will change from 0xF34h to 0xF41h
o Updated BIOS required
o E-0 is pin compatible with D-0
o Data Sheet available July 14, 2004
• New S-Specs for affected product line items