That's not how power limit works. It just controls throttling. AFAIK your model is not known for very efficient cooling. It is more on the quiet side. Have you tried setting a more aggressive fan curve? Also, what do you mean by "lower states"? If you want lower load temp, you need to undervolt the performance states. Also, if you can, replace TIM, I got -10C idle, -6C load from that alone.