rocky1234 :
Actually the IMC didnt have to much to do with it as you stated. The Athlon XP was able to the P4 just fine & the Athlon XP was also runing at much lower clocks Hence the PR ratings from AMD. It was pretty sad that a 2ghz CPU was able to smoke a 3.2Ghz P4 in most everything. When AMD came out with the Athlon 64 with IMC the gap grew even bigger in favor of AMD.
Oh & no I am not a fanboy of AMD I have 6 computers & all of them have Intel inside. I just have been around in the service industry to actually know enough about this.
Thanks
That is all
Athlon XP's main opposition was the Pentium 4 Northwood. The newer-model Northwood processor ran cooler and more efficiently, to put it simply, and the Athlon XP had trouble beating it. While the Athlon XP had a higher IPC count (that is, it did more at the same clock speed), the Northwood's clock speed scaled a hell of a lot higher. The Northwood went all the way up to 3.2GHz, and the Athlon XP to 2.2GHz (3200+). The Athlon XP 3200+'s PR number was sort of misleading, as it was slower than the Pentium 4 3.2C.(Northwood core) The Willamette was older than the Palomino btw so no comparison.
Those numbers AMD used w the Athlon XP's represented which P4's they comapared to or beat.
As a result, the Pentium 4's introduction was met with mixed reviews: Developers disliked the Pentium 4, as it posed a new set of code optimization rules. For example, in mathematical applications AMD's lower-clocked Athlon (the fastest-clocked model was clocked at 1.2 GHz at the time) easily outperformed the Pentium 4 Willamette, which would only catch up if software were re-compiled with SSE2 support......
Software devs helped hinder its performance at launch due to the newer instruction sets that were introduced. (Willamette core) x87 floating point legacy was still used over sse2 coding thus hampering it.
So Gen vs Gen the Northwood and Palomino were on par. Palomino was also the first AMD chip to utilize ALL SSE instruction sets from the P3 along with 3DNOW! (which allowed vector processing) Just depended on what code the software running was optimized for.
So depends which Athlon ur speaking of truly LOL
Ive been around for awhile myself K?
And the IMC on the Athlon 64 is what destroyed the P4 in 2003 along with other additional instruction sets along with the SSE,SSE2 SSE3 MMX (these four are still licensed from Intel among many others) 3DNOW! Enhanced and AMD64, the TLB (Sledgehammer and Clawhammer in 03)...... dig deeper
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that is all
thanks, as you say
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