How High Can You Overclock An Althon XP 2000+

Rite now I have one of my older systems running at 155 mhz through bios…now I have 3 case fans (1 on proc and 2 on windowed side panel)and have successfully been able to get my 2000+ to 1.98 Ghz

Is this all the high I can go with this proc? 🙂