P4 1.5GHz = slower than P3 1.0 GHz???

[lgmcben]

P4 1.5GHz (only the "1.5" GHz model) is slower than P3 "1.0" GHz due to some inside architecture. Is it true?

I heard this from my friend who's quite skilled in (shopping) computer.

My system is P4 1.5 GHz T__T

[EvilRick]

I'd like to hear his explanation on this.

You can compare their specs yourself here

[duffman_108]

I herd the same thing before. P3 are the same as the P4 that are under 1.8ghz. I herd there the same P but P4 has more cach and more bus speed but is the same chip as the P3.

[dejha]

yes the first model for the P4 was badly underpowered. It all dealt with making such a large change in the legth of the pipeline and some bad prefetching in the first core. The pipeline was almost twice as long (i think 20 stages) and missed (wrong prefetch) more often which meant it had to dump and retreive all that data again. But this also went with a lot of other factors at the time, including the short lived chipset that was in use at that time and also the memory latencies that came along with systems running Rambus Memory. Also the P4 architecture was pushed very quickly to market after the P3 line stalled prematurely (Intel recalled like half the P3 1.3 Ghz chips as DOA, and then had nothing new for almost 7 months)

Anyways, why's it matter?

Suprising how little you people know for trying to help inform others. It's not always about the specs or the bus speed, or else AMD still would not have the customer base they do.