XP 3200+   Barton (L2 512KB) 2200MHz 200MHz    11.0 x

XP 3000+   Barton (L2 512KB) 2100MHz 200MHz    10.5 x  

XP 3000+   Barton (L2 512KB) 2167MHz 166MHz    13.0 x

XP 2800+   Barton (L2 512KB) 2083MHz 166MHz    12.5 x  

XP 2800+   Thorou (L2 256KB) 2250MHz 166MHz    13.5 x  

XP 2700+   Thorou (L2 256KB) 2167MHz 166MHz    13.0 x  

XP 2600+   Barton (L2 512KB) 1917MHz 166MHz    11.5 x

XP 2600+   Thorou (L2 256KB) 2083MHz 166MHz    12.5 x

XP 2600+   Thorou (L2 256KB) 2133MHz 133MHz    16.0 x

XP 2500+   Barton (L2 512KB) 1833MHz 166MHz    11.0 x

XP 2400+   Thorou (L2 256KB) 2000MHz 133MHz    15.0 x

XP 2200+   Thorou (L2 256KB) 1800MHz 133MHz    13.5 x

XP 2100+   Thorou (L2 256KB) 1733MHz 133MHz    13.0 x

XP 2000+   Thorou (L2 256KB) 1667MHz 133MHz    12.5 x

XP 1900+   Thorou (L2 256KB) 1600MHz 133MHz    12.0 x

XP 1800+   Thorou (L2 256KB) 1533MHz 133MHz    11.5 x

XP 1700+   Thorou (L2 256KB) 1467MHz 133MHz    11.0 x

Note the 2 FSB variants of the XP 2600+ (Thoroughbred Core) and the XP 3000+

For AMD CPU ID markings, look here:

http://www.pantherproducts.co.uk/Articles/CPU/AMD%20CPU%20indentification.shtml

 Changing the FSB can unduly affect your AGP port as increasing the FSB takes the whole of the Northbridge side of your Motherboard up with it. And the AGP port is not very overclock tolerant.