Thought about it and there's some truth to this. The only time I have success in pressure situations (i.e. work) is when I do a variety of exercise and then carefully and consciously coordinate the entire speech apparatus from a related state. If I don't do exercises, and if i'm tired and under stress, it just feels like the act of producing clear sentences is an overwhelming task which then triggers doubt that exasperates the stutter. I've sort of integrated stuttering and stumbling into my speech while keeping calm when do happen to move things along, but the way you described it as not having enough or faulty RAM is interesting.