Intel's Part Number Descriptions Explained here:
Intel has changed what the leading Alpha means. The change happened when going from the 35XX (55XX) to the 36XX (56XX) series.
In the older series it meant:
E = Enterprise and CPUs with a TDP of 80 Watts
X = Accelerated and CPUs with a TDP of 95 Watts
W = Workstation and CPUs with a TDP of 130 Watts
and in every case the leading numeric after the alpha meant:
3 = for single CPU use only (1 x I/O Bus)
5 = for dual CPU use, but will work in single CPU applications (2 x I/O Bus)
In the later series, the above nomenclature rules stayed constant EXCEPT - The "X" prefix means accelerated (95 or 130 watt TDP) and is only used on CPUs with a 2 x I/O bus. The "W" prefix is now used only in the single CPU series (1 X I/O Bus).
In any case in both series, the meaning of leading numeric after the alpha has remained the same. A "3" for CPUs with a 1 x I/O bus and a "5" for CPUs with a 2 X I/O Bus.
I hope this makes sense to you. It took me awhile to figure it out.
I hope your are wrong, but if you're right = what a BIG dumb mistake. Can anyone else "chime" in on this please?
