So, I have a Phenom x2 550 and a MSI 790fx-GD70 yet I can't unlock. I've tried all the bios that msi offers but none work. If i'm doing it wrong can someone give me a guide specifically for the mobo i'm using. And I heard of the 1.5b3 bios, but i can't find that anywhere, can someone give me a link to that?