want to buy that card, which bios you use ?
Here is the bios which run stable at 2100 memory clock for three hours 29.8mhsh, probably at 1950 can be stable with 27.4 mhsh.
https://ufile.io/izbeocheck your log files for errors, run it at 1200 core 1950 mem. those should be safe. if you want to push move it up to 2050 mem max should give you decent results. ive undervolted the bios also.