What kind of performance boost can I expect with this setup?

[zanos]

I'm going from

P4 3 GHZ 2GB DDR400 PC3200 SATA1 HD
Nvidia 5700 le agp

To

AMD Athlon X2 AM2 2.2GHZ DDR2 800 PC6400 SATA2 HD
nvidia 7600GT pci express

I also plan on overclocking the mobo and video card. From my past experience I don't often notice too much difference from upgrades.

[jagabo]

Performance boost doing what?

http://www23.tomshardware.com/cpu_2007.html
http://www23.tomshardware.com/graphics_2007.html

Your old 5700GT is too old to make the above graphics chart. But you can look at some older versions:

http://www.tomshardware.com/2005/07/05/vga_charts_vii/
http://www.tomshardware.com/2004/10/04/vga_charts_iv/

[redwudz]

It should be faster, at least for encoding, more due to the two cores, memory upgrade and the SATA drives than just the CPU speeds. And that depends somewhat on the programs used.

As far as overclocking, depends on your CPU version, motherboard brand and model, memory specs and video card.

I assume a 4200+ Windsor CPU. You will likely need a different CPU cooler than the stock AMD for any aggressive OCing. Watch your temps closely.

[Supreme2k]

When I went from a P4 2.7G to an X2 2G, DVD Rebuilder (and Henc) completely ate it up. I got more than a double performance boost with encoding, even though I was previously using HT with the P4.