Then i suggest you don't attempt to do any overclocking as it is a very involved process and requires alot of knowledge of your bios, Ram timings, vdim limits, Gpu memory and what it can and can't handle, adequate cooling, and most of all patience. Nobody can tell you exactly what you need to do to get your system to overclock or hold your hand through the process, as identical systems will overclock differently.
The same GPU chip won't necessarily be able to handle the same increase in clock frequencies. the same applies to your CPU and Ram, if the bios even will allow you to change any of the required settings. You generally raise each setting a little bit at a time until your system will no longer boot or respond, then back them down and run a stress testing program such as Prime95 to make sure your system is stable at the new settings without increasing the heat to a point that it will damage the hardware. Good luck. Fabe