How high to overclock

[mmbigness]

Hello,
I would like to try to speedup my Nvidia geforce 9600 gso 1gb gddr2 it runs on the core is at 580 and mem is at 400 how can I overclock it up or how higth is the max?

 

[Pearlmam]

Don't double post and try to do some research on the topic before posting