Intel upcoming Alderwood and Grantsdale chipsets are scheduled for launch
during Computex Taipei in June and the LGA775 Prescotts are expected to be
launched at the same time, according to sources from the motherboard
manufacturers. One of the presentation slide from IDF also revealed that the new
platforms will be ready in June. The launch of the new platforms are initially
expected to be during May but the slight delay could be due to several reasons;
the current version of the Grantsdale and Alderwood chipsets is B1 stepping
which aren’t ready for mass production yet due to bugs and the one of the
problem we heard is that the B1 stepping Alderwood has no ECC support for
DDR2-533 and a B2 stepping is needed to fix that and the PCI Express graphics
cards can only be ready in June.

As we have heard, Intel is pushing Alderwood to
support DDR2-667 when the specification is ready which will become one of major
difference between a Alderwood and Grantsdale but it won’t be ready anytime
soon. One of the criteria to support DDR2-667 is that the PCB design has to be
modified and also improvements have to be made to the DDR-2 667 spec like
additional ODT value, improved AC timing values and tighter AC/DC operating
conditions. We have also heard from one of the board manufacturer that they are
working on enabling the "special bypass" on Grantsdale boards which will enhance
performance to match up with the Alderwood.

intel LGA775 Prescotts, Grantsdale & Alderwood In June

Intel upcoming Alderwood and Grantsdale chipsets are scheduled for launch
during Computex Taipei in June and the LGA775 Prescotts are expected to be
launched at the same time, according to sources from the motherboard
manufacturers. One of the presentation slide from IDF also revealed that the new
platforms will be ready in June. The launch of the new platforms are initially
expected to be during May but the slight delay could be due to several reasons;
the current version of the Grantsdale and Alderwood chipsets is B1 stepping
which aren’t ready for mass production yet due to bugs and the one of the
problem we heard is that the B1 stepping Alderwood has no ECC support for
DDR2-533 and a B2 stepping is needed to fix that and the PCI Express graphics
cards can only be ready in June.

As we have heard, Intel is pushing Alderwood to
support DDR2-667 when the specification is ready which will become one of major
difference between a Alderwood and Grantsdale but it won’t be ready anytime
soon. One of the criteria to support DDR2-667 is that the PCB design has to be
modified and also improvements have to be made to the DDR-2 667 spec like
additional ODT value, improved AC timing values and tighter AC/DC operating
conditions. We have also heard from one of the board manufacturer that they are
working on enabling the "special bypass" on Grantsdale boards which will enhance
performance to match up with the Alderwood.