overlock

Over lock means...??---to make system optimized for better performance.. How can i overlock ... what does it need..??! is any kind of software is needed to do this...!! Need to know..i know it's a kiddy type question..but i really don't have any idea..please answer..

Hi I want to overlock my sys pls help me I am having sys config as: AMD ATHLON 64 2800+ (1.80 GHz) ASUS K8S-MX 512 MB RAM ( DDR 400 ) PS 300W I am currently overlocked my sys and now my sys shows AMD ATHLON 64 2800+ (2.12 GHz) can I change my multiplier from 9x to 9.5x? will...