Which I5 processor do you have?
Does you BIOS have an option to enable \ disable turpo boost \ speed step?
Does you BIOS have an option to enable C-states?
I don't see any options in the bios that have to do with turbo boost, speed step or c-states
Not s good sign.
Most board bios contains option to enable / disable one or all ot the power options.
Turbo boost uses the C states to function.
Speed step is a seperate feature, though somewhat related.
Any BIOS updates on your mother board's support site?
No BIOS updates for my model.
I've noticed this board is rather lacking in features.