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Old 23rd December 2006, 01:03   #23
Atmo
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Join Date: Feb 2002
Location: Australia
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Quote:
i saw 2.2ghz but i swear there was 3.0 and 4.0ghz proecssors or mobos.
Yes, the were P4's up to 3.8ghz (for the EE version anyway).

However, due to the P4's architecture (see here and here) they did less work per clock cycle than a PIII or athlon cpu's of the time.

That's why AMD chose to go with (and still currently use) it's performance rating (2500+ for a 1.83 ghz barton atlon XP for example, as it would roughly match or beat the performance of a 2.5ghz P4). The current Core 2 cpu's are based on the Pentium M architecture, which is based on the old PIII architecture. Despite having a lower clockrate, they do much more work per clock cycle, and are much more power efficient. Of course if you're looking at them based on MHZ/GHZ alone, it can cause confusion.

The best analogy i can think of is that it's like comparing the 2.4 litre 4 cylinder in a toyota camry to the 2.0 litre 4 cylinder in a honda S2000. Despite being a smaller capacity, the S2000's motor still makes about 50% more power (117kw vs 184kw).
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