LucidLogix is definitely an interesting company. They had HydraLogix (the mixed GPU & SLI/CrossFire alternative) and Virtu. (which allows you to use Intel's QuickSync with an addon GPU) Interestingly, they don't really even mention HydraLogix on their site anymore, which is a pretty good indication of how useful it was. I suspect the reason they're being quiet about what GameXtend actually does is that it's a combination of techniques like simple frame rate caps that keep power consumption in check. I wouldn't mind being proven wrong though.