Overclocking xp2500 and A7n8x dlx

I am rather new to the world up overclocking.... Anyway, I upgraded my cpu to a xp2500 and I can only manage to overclock it to 2.07 stable (180x11.5). Any higher than that, my system reboots and when it boot backs up in Windows, I'll get a series of Windows errors, One in particular that says my video card is causing system instability. So I plan on reinstalling the latest drivers for my ATi 8500le 64mb to see if that helps. I did flash my bios with the latest update to upgrade the A7n8x Dlx ver. 1.04 to support 400mhz FSB. Anyway, what do I need to do to get my system to run the FSB at 200mhz? I tried 200x9.5,9,8.5 etc each time it reboots or I have to reset the bios? Thanks in advance!!!

Specs:
A7n8x Dlx v1.04
xp2500 / Volcano 7+
WD hd SE
Kingston PC3500 Hyper x
Ati 8500le 64mb
Windows XP Pro w/sp1
3Dmark2001 score: 10600

i know that only the rev 1.4 and up support 400fsb but i've seen others do it...go into the amd faq and start there....

You probably need more Vcore voltage. I have a different board but I needed 1.725 to get the fsb to 200. Try 1.750

b4 upping voltage, you could try reducing the FSB by a few MHz to like 175 where you're rock solid and try upping the multiplier, and see if you get any higher speeds stably. If you do then its a mobo issue, you could see if your northbridge gets any hot, and if it does, then it definatly needs cooling, also a VDD mod may be in order (that's the northbridge voltage) to allow you a higher FSB, by giving more juice to the NB.