I think, it is working well.. In Hybrid-SLi, motherboard switches to high power GPU while running 3D applications. If the system is not working with 3D applications, it swiches to low power GPU by turning OFF the powerful GPU..i.e, 2D mode for Power Saving. By using 9800GTX, you utilise Hybrid Power feature of the Hybrid SLi system.
thank for yr information but why does the geforce 9800 gtx not show up in device manager it just has the geforce 8300 on board gpu and vga device underneath it and when i toggle on performance mode it just freezes for a while and when i boot into windows when hybrid is in save mode it takes ages to be able to move the mouse and go into programs