AMD 2500 is shown as 1900

[aznherb36]

At first when my custom PC was working it did perform at 2500, but when I killed the mobo and messed up the HDD which right now is fixed, it is performing at 1900. I went into the bios and I saw CPU Clock : 133 Max 165

I am guessing that that changes the 1900? I dont want to mess the PC up since i built it for my parents.
I have :
CHAINTECH 7VJL5 "SUMMIT" KT400A+VT8235 soc A 3xDDR 4xAGP, 6PCI, LAN, UDMA133, USB 2.0, SB

If you need more information I will get it

[gibbonsl]

that CPU is an 166(333) bus speed

you need to set it to 166 fsb for it to read as a 2500