seacue,
I see BayAreaLondoner reads the same articles I do. The article he referenced is an excellent resource. I have a lot of respect Anand Lal Shimpi and his reviews.
When the PIII was Intel's flagship, I only sold PIIIs (and Cels with the PIII core). When Intel released the PIV, the numbers on the CPU were so dismal, I stayed with the PIII. Intel made some real compromises with the PIV and most of the early PIVs were slower than the PIIIs. When tne first nForce Chipsets came out for the AthlonXP, I switched from the PIII to the nForce/AthlonXP and I have never looked back.
Intel only caught up, if you want to call it that, with the PIV HT. Then Intel comes out with the PIV Extreme Edition, I find it hard to call anything Extreme when an Athlon running at 1Ghz less can keep up with it.
In order for the PIV to work a its full potential, it needs to a lot of memory bandwidth. The PIV based Celeron is a "Crippled Core" PIV. When Intel has a PIV which the die is bad in one of the areas for the on chip memory, they lock off the bad side and just use the other side for the onchip memory. That is a Celeron.
You can imagine how dismal the Celeron's performance is since the design is very memory hungry and it only has half the memory of a PIV.
I hope that was what you were looking for and I was not just ranting on.
Take Care,
Richard