Re: 640x480
Yes for test bed purposes for my monitor and graphics card if I suspect there's an issue there. Just not a game, with the resolution choices built in, it's also a great quick graphics system troubleshooting tool for me as well, though used rarely. You can't have enough tools in the toolbox after all! 
For game purposes, no, usually set for what my monitor/graphics card will give me based on the game choices.
Regards,
Pat
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"Commanders should be counseled chiefly by persons of known talent, by those who have made the art of war their particular study, and by those who are present at the scene of the action, who see the enemy, who see the advantages that occasions offer, and who, like people embarked in the same ship, are sharers of the danger." - Roman General Lucius Paulus
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