Viewers

Currently I am using the regular second life software. And I noticed my machine runs a bit hot when I am on it and lowest or higher settings doesn't really make a difference it's about the same temperature. I have no speed or lag issues whatsoever it runs great! Just wondering if there is a viewer out there that might be lighter to use or less taxing to take that edge off and keep my machine a bit cooler. All opinions or advice is welcome.