This particular monitor is limited to 60Hz over Hdmi. There are Displayport to DVI Dual Link active adapters that are capable but are expensive, 100$. Can almost buy a new monitor for that.
Your monitor's Hdmi port is v1.4. Doesn't matter what the cable was sold as, it's just a cable. Many cable companies sell them as v2, v2.1 etc, it's just marketing ploy. The specific version attributes begin with the port itself. Ie; Graphics card and monitor must have the same Hdmi version port to take advantage of the features on offer. Hdmi is backwards compatible however, but always limited to the oldest version in the link at each end of the cable, be it monitor or graphics card.