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If they are going after high end programs (3D etc) they really could do with every bit of speed they can get. However, you are probably right about going with the 266 version.
 
if Apple want speed they better start pumping out 64bit boxes. Dont forget PowerPC is designed not to create heat (this is what im observing) and everytime you more speed you need to reinvent wheel so there is no heat!

the G3 iMac only had a heatsink dont forget.
 
Quote of CNET.

Desktops:
Pentium 4: the next generation
By Lori Grunin
(5/7/02)

The 850E chipset also lacks a couple of key features, which may mean that this iteration of motherboards won't be around for long. First, it supports only PC800 RDRAM (800MHz) rather than the next-generation RIMM 4200 (1.06GHz), which


****

Look at the memory speeds!!! How can Apple on just introduce DDRAM 266?? Surely they must uses some of these faster types of memory?
 
And you know what. That 133 MHZ of system bus, and the 153MHZ of processor power only musters a 3% increase in performance. Why, because the architecture sucks. Period. When AMD comes out with a 2.53 GHZ system with a 533 MHZ bus, that will be fast, real friggin fast. I would still take the Mac over the PC because the system lets me work. 🙂
 
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