Then you are using a terribly inefficient and old CPU mining program. I get 3.9MH/s per core of my non-overclocked 1090t.
(I used pooler CPUminer 2.2.2 64-bit.)
True, my CPU is not a top-notch one anymore, but hey - even your CPU is just at 3.9 mhash/s. Compared to 370 mhash/s, this is a ridiculously low value when you compare CPU vs. GPU in general. If your gfx card is a slow one, and your CPU is doing better - stick to it. For me my GPU is more than 100x faster than my CPU.
Yep. CPU mining is not worthwhile but I am just pointing out it is not as bad as people make it out to be because typically those people haven't used modern CPU miners.
As a comparison, the Radeon 5450 overclocked will get about the same as the 955... while using 1/10th the power.
edit: just re-read your post.
I also notice you are not at all familiar with CPU models or what a core is. I am not going to go into detail but suffice it to say, My CPU can do 3.9 X 6 = 23.4MH/s minus any inefficiency loss for multithreading (I have noticed there is some in CPU mining). Also, the cores in your CPU and mine are the same. I am indicating that your CPU should be able to do 15.4MH/s minus any multithreading efficiency loss.