P4 let us all down, P3 (P6) did not - conroe is not a netbust chip its based on P3/P6/Pentium M
GAH. Stop calling random chips the P6.
The P6 was the PENTIUM PRO.
And Conroe is based on the Pentium M, not the PIII. Yes, the Pentuim M was based on the PIII, but the PIII was based on the PII and the PII based on the P6, which was based on the P5.
So, Conroe is based on the P5 I guess.
The PIII used PC100 memory and was very different than the current Conroe architecture. Please stop comparing them. Conroe uses a lot of technology that made NertBurst what it was. If you remember, NetBurst was just a quad-pumped FSB transport. All of the other things (Such as SpeedStep, Virtualisation Technology, and 64-bit addressing) are still alive in the Conroe.
P6 (686x) is the architecture, the way it works, not so much a core name, and Pentium M originally was a tualatin with twice the cache and the P4 fsb (same fsb design but QDR) and ram dont matter - P4 boards came with SDR support at one time, and speed step etc was in the mobile tualatins - no big deal.
P6 changed the most at once and was nothing like the P5 (pentium 1/586x)), and the sucessors after the Pentium Pro were just tweaked versions, adding features and refining the manafacturing process.