Why do i get less points when at 4.32GHz rather than 4.0GHz

i7-980X

Asus P6T

32GB DDR3 mixed memory

No, it’s not throttling, as i have a NH-D15 with fresh MX-4. Max temps are around 65 degrees

Cinebench R15

4GHz = 936 pts

4.32GHz = 890pts

Also what’s up with my single core utilization on single core test?