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I seems that the XP2500 mobile is the new best overclocker in the Athlon XP line. It runs at 4.5v, and has a higher heat threshold. And it can run at XP3200 settings without changing vcore. Is all of this true and does it matter that it runs at 266FSB and can get all the way up to 400FSB?
And also on another note would it be worth it to build a xp2500-m and overclock to xp3200, or build a 64-bit rig and buy a low-end Athlon64, like the 2800 64 or the 2700 64. Which is faster and more reasonably priced? And what are the overclocking capabilities of low-end Athlon 64s?
well firstly, the athlon 2500 runs at 333FSB, not 266FSB as far as i am aware, it is certainly the case for the non mobile ones.
i would personally get an athlon 64 processor.
i had to up vcore to 1.775V to run at 3200+ speds stable.
AMD Athlon 2500 @ 3200+
Abit NF7-S v2.0
512MB (2x256) matched pair Corsair XMS PC3200 DDR400 in dual channel
Sapphire ATI Radeon 9800 pro 128MB
Maxtor Diamondmax 80Gig HD ATA133
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the mobile versions of the a64 and xp are the better overclockers.
The rule of thumb is to get the slowest cpu of the leading-edge design that runs at the lowest vcore. This means a 1.35v mobile barton or the 2700+ mobile a64. I'm not sure you can find the 1.35v so 1.45v may have to do. Default fsb does not matter if the cpu is unlocked. CPUs are ghz bound, mobos are fsb bound. A CPU can handle any fsb. I don't know how the mobile A64 compares with the mobile barton but surely the barton is the better deal still, though the a64 will get there soon enough.
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For all the Athlon XP2500-M's I've seen for sale, they've been 266FSB, unlike the desktop 2500s.
http://www.newegg.com/app/ViewProductDesc.asp?description=19-103-401&depa=1
And does anyone know how the memory controller on a Athlon64 works, and what 1600mhz FSB really means? Thanks
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the memory controller of the a64 works like pci-e, which means it has a set of lanes for northbound bits and a different set of lanes for southbound bits. Everything before it is like a bridge that can only allow one direction at a time.
This difference eliminates latency, which is the computer word for waiting.
The a64 controller simply allows bits to go both ways at one time. It is the most significant cpu invention since cache.
It is overpriced, like everything is when its new. But later it will become essential. After the early-adopters have paid for it, ie, paid for its development.
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Thanks a lot johnoh. I think im ganna go with the a64 2800. Even though it's 100 bucks more, i'll have a socket 754 mobo now so I can upgrade cpus in the future without changing mobos.
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sounds good. But I would not assume you are going to upgrade the cpu later. Its rarely worth it to swap out cpus on a given mobo.
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Well right now a64 2800 are around 185 bucks. And sometime around the beginning of next year a64 prices will probably drop some, so I can upgrade to a 3200 or something without having to change mobos. And by the way have you heard any success with overclocking a64s?
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but if you swap out a 2800 for a 3200 you are making a barely perceivable improvement to your system. That's why I said its rarely worth it.
The mobile A64 oc's I've read are about like the mobile barton, but there are not enough of them out there to know for sure.
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Ya you're probably right, it would only be like a 10% increase. I know its a stupid question, but what do you think the percent increase in performace an A64 2800 has over a oced xp2500-m to xp3200 settings?
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I think the barton 3200+ is better. The question is what can the a64 2800+ oc to. If the barton and the a64 could each hit 2.5g then you want the a64. The problem is that at this early stage the a64 is still being hand-picked when its rated and the 2800 is probably a 3200 that failed. Later in life this does not happen, and a 2800 would be no different than a 3200. But at this point who knows - the a64 2800 may not oc much.
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That's a valid point johnoh...and your #6 and #8 responses are too. I recently went from a Duron 1300 to a 2400 Tbred on an old board to satisfy my curiosity and although I can see a performance increase, it's less than moving from a Duron 700 to the Duron 1300.
Pure Mhz means less as A64 and pci-e become available and I'm just waiting around for a reasonbly priced A64 and motherboard with pci-e capability.
To jump on the analogy wagon, you can't slice cheese with a 2X4.
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