If you check the graphics card info memory clock speed is clearly displayedI can't tell what is shown in that page - all four results appear to say the memory clock is the same (2235MHz - is that right?). And no frame rate or power - so hard to compare with what you showed before...
But it's interesting that you're apparently reporting that performance appears to scale best with memory clock in what seemed like a compute-limited benchmark.
Framerate is also shown, the score is basically based off of framerate.