Intel Pentium 4 1.6A GHz

Some of the lower clocked Pentium 4's with a Northwood core were popular by overclockers. Some could get to the range of 2GHz - 2.2GHz without increasing the vCore so usually there is more headroom left with a little bit more juice. However, do not use excessive vCores on the Northwood CPU's due to electromigration. Back in the day overclockers found that going beyond 1.7V might 'fry' the CPU. This phenomen was known was the Sudden Northwood Death Syndrome (SNDS).