Ya you get 4.2ghz at Stock Voltage without touching it!! idk bout 4.3ghz
& those Temps you're getting is Very Good!!! The Max on the Cpu is 105c dont wanna go over 90c!! Staying Under 90c wont Hurt your Chip!!
I'm at 4.5ghz at 1.295v with Vcore Loadline on Turbo & its Complety Stable!! You can Go Higher just Depends on your Temps & stuff keep them under 90c
You only Change the Cpu CLock Ratio or Turbo speed & Change the Cpu Vcore or use Offset mode!! Idk how to use that offset thing!! Hyper 212 Plus is alright Hyper Evo 212 is Better what I have