That's good advice, but I'll add mine.
For some reason, voltage readings on the Asus A8V are low, but it's no problem.
The default when the Vcore is set to Auto is 1.55 and the reading will be a little bit less.
Leave the multiplier where it is at 13 unless you use Clockgen found here.
http://www.cpuid.com/clockgen.php
If you set the multipier to 14, you are raising your FSB by 200 to 2800. The chip will handle it, but you have to watch your temperatures. As you raise your FSB, you need to also raise your Vcore. The side effect to doing this is heat. If you try for a multiplier of 15, you may lock up, and then you'll have to reset your Cmos to get the MB to work again. If you use Clockgen, the settings are not saved, only temporary. I found out about this the hard way.
Run the Asus Probe monitor, and Prime95 at the same time, your cpu will be much more than 40c, more like 50c. Or you can run your game in a window, while watching the Asus Probe monitor.
Raise your FSB to 210 (2730), leave the multiplier at 13, and raise your vcore to 1.6v. Then try running the benchmarks and see if they complete. You raise the FSB until you have problems, then give it a little bit more Vcore. The highest Vcore I've found on my board is 1.725v, above that, it doesn't help.
Some have gone all the way up to 3.0 on air, but their benchmarks lock up. If you want to try for that, you would set your FSB to 230, vcore to 1.7 and then see how hot you get.
Wanna know the easiest way to do this? Let the MB handle it. Go for the 10% over and everything will be set for you.
http://www.nogodforme.com/images/DSC03898.JPG
That will put you at 2860, which is nice. I've found I get my fastest 3dMark05 scores doing this.
Then run the Asus Probe monitor and see how hot your CPU is. If you are at 60c or lower when running Prime95, then you're ok.