Just wondering if anyone's messed with OCing their AMD chip and if so what's the chip rated at and how far have you had it going.

More specifically, I'm looking for someone that has OC'ed their 2900+ or 3200+ 400 FSB CPU's and to what extent but curious as to any other speeds out there.

I'm running a 2800+ 333 fsb running at 3100+ (2287.1 core clock) with a FSB of 183 (from 166) but I'm wondering how much cap space is left with the 3200+'s since it's at the end of the line for the barton core. Were you able to get it up to 3300+, or 3400+ or is there just no space left for it to be stable past the 3200+ mark?

The XP-M is known as a good overclocking-chip, some people get as high as 2,6 GHz with an XP-M 2800+ (Barton-core) and good aircooling or maximum watercooling (we don't speak about compressorcooling or liquid nitrogen ;) ).

These cores are specially selected for having low power consumption at stock speed but that means they can be clocked higher than the standard XP-CPUs at the same power level so they are preferrable if you want to bring out the best of a SoA-system.

The "normal" 3200+-CPUs are at the top of the range and most of them can't be overclocked much because most mainboards don't get very much higher than FSB400. High clocked Barton CPUs with an FSB of less than 400 MHz (e.g. a 2800+ at 2083 or a 3000+ at 2167 MHz, both 333 MHz FSB) are generally better overclockers because the boards don't limit them when increasing the FSB.

Well, I have one Barton-M, and the upper limit is 2.4Ghz on a ABIT NF7S with a modded BIOS. I keep it on 2.3Ghz with a FSB 230Mhz, DDR 460 8) I also use Athlon XP Tbred 1700+@ 2Ghz (2400+) in the other computer on Abit KT7-A. The highest rated Barton CPU in my country was not an "-M" version, but a standard 2500+ desktop Barton. It went to 2.9Ghz (for screenshot, or watercooled), and 2.7 Ghz for "everyday use".

Anyway, the difference in speed between 2.4 and 2.3Ghz is negligible, so the difference in voltage and temperature make the further OC of the CPU fruitless. But, the difference in FSB is seen; you could try to OC your FSB to at least 200Mhz, or more (depending on your mainboard). That should give you some more juice out of an oldie (but still powerfull) barton ;)

Oh one more thing: Mobile Barton is not that much better overclocker then regular, but it's 100% unlocked. That's what it makes a better choice, not the "lower power consum"-thing. See if your Barton is unlocked. If it is, lower the multiplier to 11.5x and FSB to 200Mhz. That's the "basic" configuration. If you use old DDR333 memory then increase the voltage of the memory to 2.8/2.9V and then OC FSB to 200Mhz.

If your barton is locked, then you're going to have to do a little "wire mod" that can be found on www.ocinside.de ;)

I could also give more detailed info If you but inform us about your motherboard/RAM :)

P.S. Top 10 in my country, select "AMD" and then "barton":
http://www.benchmark.co.sr/

if you want to OC with a athlon xp take a real XP-M! not this XP-M DTR crap...
difference between real mobile and DTR is 1.45v vs. 1.65v vcore! with lower vcore you can OC higher...

and AFAIK the XP-M 2600+ is the best OC-XP...

Thanks guys for the reply. I was more or less curious, but I like all the info.

I'm running this on a Gigabyte GA-7VAX board. I love the board, seems to run real stable at were I've gotten my 2800+ chip to. The board doesn't officially support 400MHz FSB, but at 183 it seems to run pretty d*mn good. Also running two 512 Micron MX2 DDR 3200 Duel channel memory sticks in the thing (although the board doesn't support duel channel).

If that's so, than that's it. Gigabyte was never a good overclocker and combine that with an old VIA KT400A chipset without a PCI bus lock - you get squat. It may be you hit the limit on the FSB, for if you go any higher, the overclocked PCI bus may burn your HDD controler, or worse.

VIA KT400A chipset does not support dual channel memory configuration and it will do "sigle-channel" memory addressing regardless of number of sticks.
The trick of selling two memory sticks "in a dual channel configuration" is only marketing; if the mainboard supports dual channel, then it can and it will utilize two sticks of any (better) manufacturer in this mode. That means that the Micron MX2 Dual channel is the same as "normal" (or "single") Micron DDR400 and is treated so by the mainboard.

In the end, you still have a nice performer and it should suffice. Barton @2.25 with 1 GB RAM on KT400A is still quite good combo and it wouldn't pay off to buy a "shiny new" nforce 2 mobo; the difference in speed would be maybe 10% tops.

8)

I think your right about hitting the max FSB because I can't go any higher other wise it's way unstable.

Next question for you then, if I were to put the 2800+ into a board that could handle a 3200+ chip (meaning that will use a 400MHz FSB), I should be able to push the 2800+ chip a little higher and get a faster core clock speed then the 3200+ which should actually be faster then the 3200+ with both the core speed and FSB towards the max (400mhz) then correct?

wrote on 12.04.06 at 03:09:54:

I think your right about hitting the max FSB because I can't go any higher other wise it's way unstable. Next question for you then, if I were to put the 2800+ into a board that could handle a 3200+ chip (meaning that will use a 400MHz FSB), I should be able to push the 2800+ chip a little higher and get a faster core clock speed then the 3200+ which should actually be faster then the 3200+ with both the core speed and FSB towards the max (400mhz) then correct?

But you already have passed the limit of a 3200+ 8) 3200+ default clock is 2200Mhz (11x200). If you were to put your barton in a newer MB, it *could*(no guarantee) go further and that depends on your CPU sample, cooling, and voltage. But as I said before - it's not about the cpu speed any more, it's about the FSB speed. And even that is not worth the trouble (some +10% tops). You could sell all that, add a few bucks and buy 64-bit Sempron combined with a S754 MB. Allmost all of them overclock to 2.8Ghz (from a starting 1.8Ghz). That leaves any barton in dust in clock and in architecture (64bit).