this is a post from another OC forum im on...let me know of yer opinions.

Go to your bios and enter the "M.B. Intelligient Tweaker" (M.I.B) menu.

CPU Frequency: [250.0] Change this value using "+" and "-" on your numpad
CPU Spread Sprectrum: [Center Spread]
PCIE Clock: [100Mhz]
K8 CPU Clock Ratio: [Default] or [12]
Robust Graphics Booster: [Auto]
CPU Voltage Control: [Manuel]
Normal CPU Vcore: 1.500V is default but you're probably going to have to raise this
Core Power voltage control: [Normal]
HT-Link Voltage control [Normal]
DDR voltage control: [Normal]

Now the default CPU Frequency is 200.0 and you CANNOT just immediately jump it to 250.0 and think it's going to be okay. I usually jump the frequency by increments of 10mhz then run Prime95 for a night to see if the overclock is stable or not. You can speed it up a little but don't try jumping all the way with one try. Now lets say you overclocked to 2.6ghz or so and you cpu temp isn't that high but your computer keeps restarting and having stability issues, You have to now change you CPU Vcore to a higher setting. 1.500 is the default you can try increasing the vcore by increments of .025 so you can try 1.525 and see if that helps. Now increasing Vcore can bring stability but it will also increase your cpu temperature so don't up the Vcore unless you have to.

Unfortunately the manuel of your motherboard didn't show me all the menus in the bios so on some of these you're going to have to find on your own.

Your HTT should be by default set to 1000mhz. It's basically the cpu frequency 200mhz x 5 = 1000mhz with multiplier of 2 making it effective @ 2000mhz. When you increase you CPU frequency the HTT goes up as well. i.e if you CPU frequency is 210 then the HTT is 210mhz x 5 = 1050mhz x 2 = 2100mhz
People have stability issue when the Hypertransport goes above much higer than 2000mhz. So remember to find this option in the bios and change the multiplier to 4, That way when you reach your goal of 250mhz cpu frequency the HTT willl be 250mhz x 4 = 1000mhz x 2 = 2000mhz.

Also, this shouldn't really be an issue because by default most bios has the option in auto, but if you can also find a menu that lets you choose you're ram frequency. Since you have PC3200 ram it's highly doubtful that you'll be able run your ram syncronously with your cpu frequency of 250mhz (if you get there). So you have to drop your ram to PC2700 DDR 333 speed or as some bios use (5:3) divider. Therefore if you do hit 3ghz your cpu frequency will be 250mhz x 12= 3000mhz and your ram will run at approx 210mhz x 2.