Sorry that this has taken so long. It was only recently when switching my clients back over to my name that I ran through the advanced options and noticed that one of the questions is how much of the GPU do you want to use. Hopefully, this will do what you're looking for. BTW, just add -configonly to your shortcut and you can run through the client setup. Don't forget to remove it, or do what some of us have done (thanks bog) and create config shortcuts. I now have normal, -pause, and -config shortcuts.