KT333 PLUS WITH AMD XP 2600 PROBLEMS

Hi everyone,
I've been looking through multiple threads and peoples postings on the
similar problem, but non of them have solved my problem.

I have an AMD XP 2600 333fsb with my Soyo Dragon kt333 plus. I have
read that the cpu is not compatible with my mobo, but I have read
amongst others that is works fine. Currently it is clocked at 1.04ghz
with bios settings running at 166mhz PCI divider /5, and multiplier
set to auto. When I first made these changes it worked fine, and was
clocked at 2.08 ghz, but soon after a couple reboots it reverted to
1.04 ghz. I've been trying to get it back up to speed, but have
failed. I reset cmos, and it worked after I booted up, I check my
computer properties and it said 2.08 ghz, but then I went to go play a
game and it seemed slow, when I came out the computer properties read
1.04ghz. What a confusing one this is. It almost seems like the
speed is fluctuating, but that doesn't make any sense. Thank you for
reading this, and taking your time to help me! I appreciate it VERY
much! – Kory