1, the first is the memory frequency, generally to go online to see how much value is appropriate, you can also add their own little by little If there is a problem he will spend the screen dead and other phenomena!

2, the second is the core frequency, the same reason, but the magnitude of this plus will be smaller, each time to add not much, the other with the memory frequency.

3, the last one is the voltage (this is very dangerous, not pay attention to burn the card, overclocking is the best time to change this.

4, the leftmost one is the fan speed want to overclock is sure to open the fixed fan speed generally according to the amount of your super to determine how much (minimum 70% of the highest can be up to 100%)