I think there is something strange about that score. My best graphics score is 23079 I scored 21 804 in Time Spy, as you can see from this result my average clock is 2715 MHz where the one in question has an average clock of 2523 MHz an almost 200 MHz difference. So, how does one get a higher graphics score with a almost 200 MHz difference in average clocks? The only other difference I can see in the two TS results is the difference in the graphics drivers. My result is from using 21.6.1 driver. The other result appears to be with a newer driver.I think it will only help if you're just almost stable at 2150Mhz and need something little to get you there. Me and the guy that originally posted it were both only stable at 2130MHz before the tweak.
Also, enable SAM. It really helps boost Timespy scores.
Nothing is strange about that score, unless that's a reference card on air lol. My best GPU score was higher than that, but I have XTXH under water. I had to run 2770/2150 with SAM and +35% PL/TDC/SOC to get that high of a score.