Check for xtu if you have hyperthreading enabled and avx offset at 0 in BIOS. The score is too low, I agree, it might also be operating system, when I changed my 6600k for a 7700k, I had very low scores and it sometimes did not even work (XTU did not start).
On the 3dmark I think it looks ok, there is always room for improvement but this looks ok for me