CPU Upgrade

BIOS are routinely updated, and you'll need to flash the BIOS for the lastest version for your MB. Visit <A HREF="http://usa.asus.com/products/mb/ezflash.htm" target="_new">Asus Web Site </A> for Asus BIOS flashing info. You didn't post your version of your mb, but you can find the newest BIOS for that model at <A HREF="http://www.asus.com/support/download/item.aspx?ModelName=A7V266&Type=Latest" target="_new">Asus A7V266</A>. Sometimes, even though though the BIOS may not specify that it supports the next higher cpu, it often will work, but will boot with an 'unknown' cpu.


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You can use only 266 MHz FSB Athlon XP. 2600+ was the fastest 266 MHz FSB Athlon XP. Now it's very hard to find a 266 MHz FSB 2600+. Current 2600+ and 2700+ have 333 MHz FSB, which are not suitable for your mobo.

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Spitfire's right. Your board does NOT ACCEPT modern 2600+ CPU's, only the old 266 bus versions. Chances are the fastest 266 bus CPU you'll find is the 2400+

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Thanks Guys, I was afraid that I might have overlooked something and apparently the front side bus was it. I did notice that the FSB was spec'd at 333 for the newer chips but I didn't realize the higher FSB would not work in my motherboard. Thanks for help everyone.

I have the A7V266-E and had a 1700+. I wanted to upgrade too, but had a hard time finding a 2600+, so I ended up going with the 2400+.

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If you can get a XP-M(obile) Barton XP, then they run at 133Mhz/266DDR, plus have an unlocked multiplier. You could probably get one of those up to 3200+ speeds at least, although you may need a BIOS update.

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Must perform a <A HREF="http://www.ocforums.com/showthread.php?s=&threadid=279392" target="_new">http://www.ocforums.com/showthread.php?s=&threadid=279392</A> to get the high multipliers. More mods are necessary if the board doesn't support multipliers.

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