[help] gtx 860m 2gb

I just bought an 860m, i followed some threads, but have some questions.

First, the whitescreen problem when boot, can this be fixed, also if the screen goes off, it won't it will go to whitescreen.

second is the sound, will i have sound or won't. I followed one guide from 770m but when enabling the bios sound can't boot.

used 345.20 modded driver that i found in TI.

thanks for your help and guidance

[help] gtx 860m 2gb