I've just put a rig together, I'm using a 3570k, a gigabyte z77-ds3h, 8gb vengeance RAM. I want to overclock my cpu, so I go into 3d bios and set my cpu to 4Ghz. It boots into windows so I run prime 95 and cpu-z, and my cpu frequency is only 3.4? What am I doing wrong? I've updated to the latest bios, and I'm certain everything is being saved.
With ivy and sandy bridge there is a thing called CPU boost and essentially what it means is that when you run a intense program it will boost up to those clocks for example if you were to run a game it would ramp up to 4 ghz.
Unless you manually turn off the cpu boost and manually set voltages you won't always have 4 ghz pumped out.