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Socket A MB. How do I know which Processor I can use.

I have a uwave MB that came out of a compaq computer.  It has a bad processor in it, so I'm trying to find another one for it.  The problem is - I Can't find one -  The processor is a Socket A, Amd Athlon thunderbird, a0900amt3b.  I have found other socket A Thunderbirds, but not 900 mhz.  Example i found a 1.8 ghz socket A.  Have also found 1000, 1100, ... Can I use any of these for my MB.  I'm sure I can't use just any socket A processor can I?

Thanks!
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If I can't update my bios, because it won't start up, how can I update my bios.  Or will it still run just not at faster speeds?
speed doesn't depends on BIOS updating, it is a mainboard feature. Sometimes you can configure mainboard though bios, and sometimes in older mainboards (including Compaq) you have to set some jumpers. But Bios won't make you mainboard run faster than it is designed to.
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It's a Compaq Presario 5WV271.  I Couldn't find any documentation on the board at the HP site.

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According to the link stockhes supplied, the board has the VIA KT133 chipset, which will support up to 133MHz FSB.
(The indicated 200MHz is puerly for overclocking. Why I say this, is because the KT133 chipset only supports up to 133MHz.)

So to run another CPU in there safely, You can use any AMD FBS133 Socket A chip, but for newer Cores you will need a BIOS Upgrade.
Try any Thunderbird, or a Duron (Morgan Core).

A List of 133MHz FSB Socket A AMD Processors:
http://www6.tomshardware.com/cpu/20041221/images/cpu_table_amd_big.gif

You should be able to use any 133MHz(SDR) FSB Socket A CPU in that list, with a BIOS update.
I am guessing, that a 133MHz DDR chip would run, but obviously you wouldn't benefit from its DDR capabilities, so that would be a waste.
Oh another point to remember, just make sure the board can supply the correct voltage to the chip you want to use.

That table above has CPU voltages.
If you want any more info on the Chipset (VIA KT133) see www.via.com
Hey sethag

sorry for typo !

MAX 1.1 Ghz pally supported should have been MAX 1.1 Ghz T-BIRD supported

Bear in mind you have a Motherboard with a COMPAQ bios in it, so you can't be sure standard KT133 is supported



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