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To: advinfo who wrote (173841)	3/27/2003 5:24:47 PM
From: Tenchusatsu	Respond to of 186894

NorthStar, <Yeah, looking at the raw ghz numbers would favor the non-M model, but I was wondering if the 4M 2.2ghz had a more efficient architecture that would outperform the non-4M 2.6 ghz. The articles below state that the new M dramatically outperforms the 4M, I'm still curious about a 4M to non-4M benchmark.> I'm not aware of any benchmarks comparing the Pentium 4M to a Pentium 4 (non-M). But I fully expect the P4M to be identical in performance to a P4 at the same clock. The architecture of the two processors are virtually identical; the only changes to the P4M are those related to power management and power consumption. It affects the maximum speed of the processor, but I don't think the per-clock performance is affected at all. As for Pentium M, the processor behind Centrino, the architecture is vastly different than a P4M. It is made to run at lower clock speeds than the P4M, but it performs better per-clock. In actual applications, the performance of Pentium M meets or beats that of the Pentium 4M in every application except those related to multimedia. And of course, Pentium M allows some of the best battery times in the laptop market. <I talked to a rep at Sony today that said a non-4M would burn a battery in 45 minutes or so playing a DVD, I didn't realize it was such a hog. I'll probably get the 4M for the times when a 2-3hrs of battery is nice to have...> The motivation behind putting a P4 (non-M) processor in a laptop is the fact that most users run their laptops plugged-in. The battery then becomes a simple UPS while the laptop is transported from one power outlet to another. If the extra 10-15% performance is more important than any meaningful battery life whatsoever, go ahead and get the P4 laptop. For some consumers, especially gamers, this might be the case, but not for you it seems. Tenchusatsu