Yes, provided you can find your board's BIOS http://overclocking.guide/intel-skylake-non-k-overclocking-bios-list/
It is unlocked via the bclk rather than ratio. Only an Intel BIOS microcode blocks it, nothing else. You will need to flash BIOS unless you already have a backdated, supported version though so proceed with caution if you dont want to lose any data.