please be carefull with overclocking, you can burn your card. keep waching te tempertature..........maybe wit GPU-Z
I clocked through MSI Afterburner without increasing the voltage by simply changing the frequency. As far as I know without increasing the acceleration voltage is relatively safe.
Temperature monitors itself miner using commands
- auto-fan - temp-cutoff 90 - temp-overheat 85 - gpu-fan 85-100
you gotta watch the VRM's thats the GPU killer they should be no higher than 85 degrees