BIOS for HD 7750?

Hi, I am newbie in zcash mining. So I have 70 h/s in Claymore zec miner with my Radeon HD 7750. At base clocks (830/1125) I have power around 55 h/s. I am running on 1100/1350. But I think it could be better. And question is: Is possible to improve that performance with better BIOS? If yes, post here a link to it. My card is MSI Global - The Leading Brand in High-end Gaming & Professional Creation