How to tell if Athlon is 200MHz or 266MHz Bus chip?

[EglsFly]

I am trying to determine if I have a 200 or 266MHz bus Athlon, its a 1.2GHz.
Here are the markings:

A1200AMS3C
AXIA0117MPMW
Y6277140038

Can someone tell me if this a 200 or 266MHz bus CPU?

Thanks!

 

[drewski]

It's a 266. The last character on the first line is 'C'. this denotes 266 fsb.

you can also look at your bios when you boot and see what the multiplier is set at. if it's set @ 12 then it's 100 (200) FSB, if it's set @ 9 then it's 133 (266)