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Message: <blockquote data-quote="Anusha" data-source="post: 26129" data-attributes="member: 828">Pentium 4:Speeds: 1.2GHz - 3.8Ghz for single core, 2.66Ghz - 3.4GHz for dual coreCache: 256kB (earliest versions) to 2MB L2 cacheFSB: 100MHz x 4 to 200MHz x 4 (or 266MHz x 4 for Pentium Extreme Edition)Supported multimedia instructions: MMX, SSE, SSE2, SSE332-bit CPUs in general, 64-bit available more recently. 6xx,8xx,9xx and 5x1 are 64-bitAthlon64:Speeds: 1.6GHz - 3Ghz for single core, 2Ghz - 2.8GHz for dual coreCache: 512kB to 2MB L2 cache (2MB = 2x1MB for X2)FSB: 200MHz (1GHz HTT)Supported multimedia instructions: MMX, AMD-MMX, 3D Now!, Extended 3D! Now SSE, SSE2, SSE3You can't compare those two architectures with only those specifications. Usually Athlon64 can perform more IPC (instructions per clock). This is why usually a 2GHz Athlon64 performs almost as a 3GHz P4. With the above information alone, you can't say which one is better. These are good only for knowledge.Anyway, Pentium4 is better than A64 when it comes to video encoding and stuff, but with the release of X2 processor, AMD overhauled Intel in all the areas. Ahtlon64 is (was) the most popular CPU among gamers. AMD Sempron64 is a cut down version of Athlon64, which has lower cache (256kB) and which are not (yet) available as dual core. Still, an A64 and S64 perform very close to each other when the clock speeds are identical. I'd say, within 5% performance delta. Another thing is that Sempron64 is not available in high clock speeds. Mostly 2GHz range, but they boast a very good bang for the buck.After the recent announcement of Intel Core2Duo processors, the prices of P-D fell by a huge margin. There are dual core CPU's available for less than US$100 (I don't know if that's true in Sri Lanka). Since AMD can't keep up with the Core2Duo either, they had to reduce the prices too. A 2GHz X2 3800+ retail for around US$150 (from 300+ couple of months ago). Both have become affordable to normal PC buyers.However, Pentium 4, D, EE CPUs are power hungry monsters. If you are a electricity-bill concious person, and leave the computer ON for a considerable period of time in a day, maybe you should avoid those CPUs. AMD's X2 at maximum load performs cooler and consumes less power than Pentium D CPUs at idle state. That's a big advantage AMD have (had) over Intel. And mind you, AMD are still on 90nm process technology and Intel are in 65nm. Lower value suggests more advanced technology and they should be able to produce CPUs that consume a lot less power than that of higher value. This point makes AMD's attempts really admirable.</blockquote>

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