The kind of coins that are worth something, arent worth mining with GPUs AFAIK. You could donate your clock cycles to folding at home. A kind of a crowdsourced research project. Level1 has a folding team.
If you wanted to mine a coin with your machine theres a ton of options out there. Find a coin you think is interesting first, then look into how to set that up, be it solo, or in a pool.