fan is at 100%...other card is in exact same environment/settings and not having this problem.
also should note that the temps on the card with the issue are fluctuating a bit between 80-90C...when the card is running at 180mhash/s card is at 90c and when at 315mhash/s it is at 80c.
Clean it out for dust. The VRMs are overheating, it causes the cards to downclock.