Hey Sir...
There are plenty of overclockers here... that usually works hard to reach highest score is possible...
And this happens under liquid nitrogen cooling.
There are no efficiency possible that can reach this score.
That's only a bugged run... and this happens...
To me, is clear that you ran the benchmark without bad intention, but even with almost 2000 Mhz, nobody can get this score... and subtests shows its bugged.