i might have the wrong name there (hydra) but i'm referring to the tech that lets you essentially SLI 2 different gpus together? in my case, the igpu from intel and the 555m in my laptop?
when i said SLI, i meant as in pairing 2 cards together. main reason was that if you got 45ish fps in a game with the 555m and say 10-15 with the intel igpu then lucid balancing the workload across both would be a marked improvement for gaming on laptops with optimus tech.