How to max out GPu Hash rate?

[shadowhlohavec]

Hi, recently I have seen some guys posting that they have increased their gpus hash rates (Xmr mining) by doing some bios moding, is this actually true? If yes how does it work and is it safe to do it? I heard that there can be higher power consumption after doing this, but it doesn't matter coz I have some free electricity...

Thanks

[shadowhlohavec]

My actual hashrate

HD 7990 + HD 7950 --> 1000+550 h/s Xmr mining Claymore 9.6

Core voltage -1155
Power limit - +4
Clock-1000
Memory - 1500

[Golku]

most of the miners want to get everything out of the card
so thats why they bios mod it and also sometimes overclock it