You can't overclock your cpu because of your motherboard's chipset, the B85 chipset is a budget and business minded chipset that doesn't support overclocking. For future reference, at least with current Intel motherboards, only the Zxx chipsets will support overclocking. Just be careful if you choose to upgrade your motherboard that you get the right socket type. I personally have an ASUS Sabertooth Z77 motherboard as my daily driver, it's a really solid choice if you're looking for a new one, but a bit impractical considering the board runs around $250 and doesn't support your cpu. They make a Z97 version that would support your cpu, but it costs about the same, if I were you I would try searching around for a cheap Z87 or Z97 motherboard on eBay or Craigslist. Good Luck!