icolsuineg,
I understand the ramifications of solo mining. It may be unlikely that it may bear any serious fruit. But there is a certain amount of randomness as to who will solve the puzzle.
My thoughts are that if you have a machine running full time anyway why not solo mine on it as well? It would seem to me that consistency could be as important as TH/s. I would hesitate to say that it's useless.
well, why mine solo and possibly not get anything for months when you can join a pool and get a fairly steady payout? even if the pc is going to be running 24/7 anyway, mining does cause additional heat and power consumption since the GPU will be running at 100% instead of mostly idle.