i have a asrock k7s8x motherboard with the latest bios flashed and it
is recognizing the amd xp 3000+ cpu as a 2200. how do i fix this?

When You want to set up a higher speed for your cpu you have to do it
from bios. You should choose from bios an option related to cpu setup
(I think it is named Cpu Pnp Setup) from there you can setup an higher
cpu speed pressing the keys page-up or page-down. If tou don't solve
your problem tell me and i'm gonna check-it again.

I am in no way an expert, but I believe you may be misunderstanding the CPU speed:

That number AMD lists is not the frequency it runs on.  For instance
my laptop has a AMD XP-M 2800+ ... which actually only runs on ~ 2120
MHz.

I'm not sure if this is the CPU you have, but this page lists the AMD
XP 3000+ as running on 2167MHz.
http://www.geek.com/news/geeknews/2003Feb/bch20030210018584.htm
So it looks like your BIOS is detecting it correctly.  

Hopefully this answer is good enough that you can pull the question
now (or reword it).