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Topic Title: XP 1800+ specs
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Created On: 11/18/2004 10:20 PM
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 11/18/2004 10:20 PM
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mccready
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Joined: 11/18/2004

I have an XP 1800+ system in which the motherboard has died. I'm trying to buy a new one, but I'm not sure what FSB this processor supports. According to logs on the machine, the processor reports that it is a AMD Athlon™ XP 1800+ stepping 02. The info printed on the processor face would probably be helpful, but it appears to have melted off:

' ">http://www.mccready.org/2004_11_10-18_47_02.jpg' ">http://www.mccready.org/2004_11_10-18_47_14.jpg

The white stuff is, of course, thermal compound.

So what exactly does stepping 2 mean, and what FSB does this processor support?

Is there anything else I should know when buying a motherboard for this processor? (it fits a socket 462, right?)
 11/18/2004 11:06 PM
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bvchurch
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Its not going to matter what stepping you have. Stepping is the model version if I remember correctly. FSB max is 266 I believe. So it will work with most mobos, if not all Nforce 2 and Via mobos that are SOcekt 462 which is also called SOCEKT A.
 11/18/2004 11:08 PM
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JHawk56
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Hi mccready,

Stepping 2 is the third number in the CPUID, which consists of Family-Model-Stepping.

There are 3 desktop versions of the Athlon XP 1800+, as follows:

XP 1800+ T-bred B (L2 256KB) 11.5x133MHz = 1533MHz, WCPUID = 6-8-1
XP 1800+ T-bred A (L2 256KB) 11.5x133MHz = 1533MHz, WCPUID = 6-8-0
XP 1800+ Palomino (L2 256KB) 11.5x133MHz = 1533MHz, WCPUID = 6-6-2

The only one with a stepping of 2 is the earliest model, the Palomino. Yours is also a Palomino by appearance, having a square core with identification printed on it, as opposed to the 2 Thoroughbreds with their oblong cores, and the markings on separate labels. Here is a good page for visual comparison (the different colors do not mean much, by the way):
http://www.thedigerati.us/info/amdcpuchart.html#xp' ">http://www.thedigerati.us/info/amdcpuchart.html#xp

Your 1800+ Palomino uses 133FSB and should work in any Socket A mobo in current or recent production.

John



-------------------------
My ECS/PCCHIPS/Amptron PCs<br>ASRock K7VM2
 11/19/2004 07:17 AM
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mccready
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Excellent. I just wanted to thank both JHawk56 and bvchurch for their informative replies.

You wouldn't happen to know if the label coming off was a problem common to the Palominos (I would assume so since the other four processors all have that info listed elsewhere on the chip) or does it instead indicate that I did a poor job applying the thermal compound and/or seating the heatsink?

I should probably mention that prior to its death, this machine was an web/app/db server that ran 24x7 for about two years.
 11/19/2004 11:58 AM
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zir_blazer
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In Processors with the Palomino Core, there is not a Black Label telling the OPN, Stepping and Serial Number like with Thoroughbred or Bartons, instead, it is written in the Core itself. If you clear the Thermal Grease, you should be able to read the OPN written there.
 11/19/2004 05:54 PM
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mccready
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Whoops. Hehe... It turns out zir_blazer is right. The areas that are grey are actually thermal grease. With the naked eye, they look black, and the areas that are flat black in the picture are a reflective purple (the actual chip/label surface). It really looked like the label had burned off because all the grease outside the chip was white.

Once the grease was cleared, the label AX1800DMT3C was clearly visible, proving JHawk56 was right: it is a palomino (not that there was any doubt, the pictures made it pretty obvious) .

Again, thanks to all who helped.
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