Surface Pro 3 to Samsung U28E590D 28-Inch 4k UHD LED-Lit Monitor

I recently purchased a Samsung U28E590D 28-Inch 4k UHD LED-Lit Monitor to provide my Surface Pro 3 an external 4K Monitor. However, I am having trouble getting a 4K picture at 60hz.The Surface Pro 3 is Intel($) Core(TM) i5-4300U CPU @ 1.90GHz, 2.50GHzThe Samsung Montior supports 3840x2160 at 60HZ: https://www.amazon.com/gp/product/B00YD3DBOC/ref=ask_ql_qh_dp_hza​When I choose the display to Duplicate the Display, I am only able to select the highest resolution at 2160x1440 but at 60HZ.When I choose the display to Show Only on 2, I am able to select the highest resolution at 3840x2160 but nothing higher than 30HZ.My connection is a Insignia™ - 6' Mini DisplayPort to DisplayPort Cable: https://www.bestbuy.com/site/insignia-6-mini-displayport-to-displayport-cable-black/5775002.p?skuId=5775002&ref=212&loc=1&extStoreId=1160&&ref=212&loc=1&gclid=Cj0KCQiA3IPgBRCAARIsABb-iGKrdjeRv9sxEztCib7ZTePH9EKuXQqhR4oS6RCQx9zGm1WfLCxK7CoaAu4UEALw_wcB&gclsrc=aw.ds​Help????? Thanks!