GPU not getting close to benchmark?

[Skwerl23]

I have a GTX 960 and when i run benchmarks it gets around 12000 MH/s but when i actually use it with a dictionary and rules, i get around 1000 MH/s MAX am I doing something wrong? I tried the -O option.

I was using the dive.rule file and getting 1gh/s
i tried the d3ad0ne.rule and got 1.5gh/s