I understand you. I remember how I started to mining on video cards, constantly changing MHz trying to find the optimal ratio of temperature and speed of mining, spent a lot of time on it. What was my surprise when on another algorithm these settings were not optimal and I had to start all over again. I want to help you, but I do not know how. I still think you need to dig in the direction of the settings of the RAM, it is possible to swap the bars or something else.