Intel Pentium 4 processors based on 90nm Prescott core in LGA775 package will
undergo changes for the E-0 with EM64T to the G-1 core processor stepping
change. NDA Spec Update will be available in September. Customer qualification
is required.

• The CPU ID will change from 0xF41h to 0xF49h
• Updated BIOS is required
• Desktop G-1 Step processors will be Pb-Free Second Level Interconnect (SLI) /
RoHS compliant and
the integrated heat spreader (IHS) will be marked per JESD97 guidelines with e4
designation
• Addition of 2 new EM64T instructions LAHF/SAHF
• G-1 is pin compatible with E-0. The thermal/mechanical specification is within
overall package height
specification
• Intel anticipates no impact to current platforms designed to Intel guidelines
• New S-Specs for affected product line items

Intel Pentium 4 processors based on 90nm Prescott core in LGA775 package will
undergo changes for the E-0 with EM64T to the G-1 core processor stepping
change. NDA Spec Update will be available in September. Customer qualification
is required.

• The CPU ID will change from 0xF41h to 0xF49h
• Updated BIOS is required
• Desktop G-1 Step processors will be Pb-Free Second Level Interconnect (SLI) /
RoHS compliant and
the integrated heat spreader (IHS) will be marked per JESD97 guidelines with e4
designation
• Addition of 2 new EM64T instructions LAHF/SAHF
• G-1 is pin compatible with E-0. The thermal/mechanical specification is within
overall package height
specification
• Intel anticipates no impact to current platforms designed to Intel guidelines
• New S-Specs for affected product line items

 LGA775 Prescott w/ New G1 Stepping