I was using RTX 2080 and and the max it hit is 1300Mkeys/s.
Probably you are talking about 2080ti, not normal 2080
Sorry my mistake. yeah it was rtx 2080ti. Actually I ran bitcrack on different cards (rtx 2080ti, rtx 2080, gtx 1080ti ). but Now I forgot the actual results. I will check again on normal 2080 and will post the results here.