Can I run a 266 FSB Athlon XP or Duron on VIA KT133

I am currently using a gigabyte GA-7ZX (Rev 5.0)
motherboard with a Duron 1200 (12*100)CPU.
This motherboard is using VIA KT133 chip which only supports 200 FSB CPU. I want to replace my current CPU with a new 266 FSB Athlon or Duron, or Athlon XP even...
I was just wondering if it's possible to swicth the jumper on the motherboard to overclock the system clock to 133 to make it work with the new CPU?
Or I will have to upgrade the motherboard and the memory as well?

I'm using:
Gigabyte GA-7ZX (Rev 5.0)
Duron 1200 Mhz 200FSB (Morgon Core)
256Mb 133Mhz SDRAM

Thank you very much!

Thanks guys for all your expert advices.
I am not that desperate to upgrade my PC yet.
I was only wondering if it will works.
I think I'll stick with my current hardware for the moment.
I wish I can change the multiplier, but there is no such option in the BIOS nor the jumper can allow me to do this.
So all I can work on is the system clock.
I've tried to overclock before using my current 200 FSB Duron. But I can only push the CPU to 1296Mhz (108*12),and I might as well just for get it, you know.
<P ID="edit"><FONT SIZE=-1><EM>Edited by steve258 on 12/02/03 04:04 AM.</EM></FONT></P>

Yes it's possible. You are limited to 100 Mhz (200) bus speed but often you can run the CPU at full speed. For some motherboards it takes a bit of work.

I installed a Tbred B XP1700+ (mod'd to XP2400+) into a Abit KT7 (non A) which is a KT133 mobo. The chip booted at 20 x 100 = 2000 Mhz which is true XP2400+ speed but with only 100 Mhz FSB. I only used it for a day because I was just testing.

I seem to recall people having trouble doing this with the Gigabyte KT133 boards but I don't recall the details.

Anyway here are some good links.

Understanding multiplier remappings (including 15x, 15.5x, 16.5x, 17x, 18x, 19x, 20x, 21x, 22.5x, 24x).

<A HREF="http://www.beachlink.com/candjac/" target="_new">http://www.beachlink.com/candjac/</A> (John Carcich's website)

Workarounds for POST problems, 13x..14x multiplier fix on legacy boards, 133+ Mhz FSB workaround (KT133A, KT266, KT266A, and some KT333 mobos)

<A HREF="http://www.beachlink.com/candjac/Workarounds.htm" target="_new">http://www.beachlink.com/candjac/Workarounds.htm</A>

KT133 mobo overclocking (Wes Newell's KT133 pioneering site)

<A HREF="http://mysite.verizon.net/res0exft/" target="_new">http://mysite.verizon.net/res0exft/</A>

Wes runs an XP2400+ with NO MODS and at 2.4 Ghz (~XP3400+ speed) on his KT7.

You'll also find good information in the AMD overclocking newsroup, alt.comp.hardware.overclocking.amd. You'll need a newsreader or use something like Google Groups (which is what I use) to get access.

<b>56K, slow and steady does not win the race on internet!</b>