Additional info: my goal is 4.8GHz at a safe 24/7 voltage (1.39 or less, right?). My ASRock UEFI (GUI bios software) is version 1.60, there's updates that "update CPU code", not sure if that'll help. Also, even at 100% load my multiplier fluctuates....at 4.6GHz it'll move between 43x and 46x. Is this normal? If not how can I fix it
I have same Mobo and Chip I got the updated bios (1.80) it helped. I am usung Kuhler (20.. takes 1.360 Maxvcore to do 4.7Ghz under prime95. You are probably getting multiplier fluctuation because you still have speed step enabled.. essentially you have not got you volts set right to enable you to stay solid at your desired multiplier. The fix I suggest.
1 get the new bios
2 disable speed step
3 try to run your 46x under prime... if you get through all is good.. if you do not then either up your vcore (if using Fixed volt Oc, or enable ur turbo boost and play with the voltage there if you are using sn offset method of OC) also check out both Leaps from Shadows (Offset OC) and 4Ryan6 (Fixed voltage Oc) posts.