Make sure you're overclocking right, read this guide
And if you don't understand it, ask what you don't understand on the forums and this should go smooth for you like it did me. I overclocked my A64 3200+ to 2478 on stock cooling, I couldn't go further because I don't have great cooling and my vdimm wouldn't go past 3.2v on my motherboard.
This is a great guide and it helped, but what helped the most was a guy on overclock.net. Gave me alot of help even though I was slow to learn and had many questions. I'm sure you can find people as helpful here too.
Make sure you understand all this and it will help VERY MUCH
Edit: Metal does own. Rock on.