Evga Precision is what I like to use to OC Nvidia cards. There's plenty of other options out there as well, but that's a good place to start.
Generally graphics cards are shipped with their fans not running at 100%, so you can up the fan speed to counteract the overclock.
Overclocking your CPU will most likely gain some performance as well.
Thank you Pyroflea for replying,
I overclocked it to max and is using my AC to cool it.
load temp 32 degree C
casual temp 12 degree C