I take the quoted boost clocks with a big spoonful of salt tbh. Iirc my 980ti in sig has a listed boost speed of 1297mhz, stock clock of 1178. But it hits 1329mhz. But what I hate is the downclocking, at 63c the boost drops by 13mhz. Totally stupid imo as this temp is so low, my max in game is 65c using a custom fan profile.
Get a waterblock on there.