Hello all. I was wondering about something. I use this BIOS here http://www.techpowerup.com/vgabios/1017/Asus.HD3870.512.071017.html But it doesnt say if it removes the lock core (860Mhz?) -Should I use another BIOS? -If I set my core to more than 850Mhz, I get artifacts. Is it because I have an locked BIOS or because I need more GPU vcore?