Hybrid SLI is it/isnt it?

Hello there! I am a nooblet to this forum and was wondering if anyone could help me out with a question about Nvidias hybrid SLI?

I have rebuilt my pc with a new 7750 processor and an Asus M3N-H HDMI motherboard. The motherboard comes with an Nvidia 8300 mashed up inside it but I also have an XFX 9600gt nestling in the pci-e slot.

Both are seen by windows xp64 with the 8300 seemingly using 512mb of my ram (like one of those party comers that brings you NOTHING) and the 9600gt using its own 512mbs.

My question/s:
How can I tell if both chips are actually being used SLI style? There are no conflicts or anything and I can set parameters for both in windows and nvidia settings but I think the 9600gt is the one controlling stuff.
Is there any point in this 8300 or is it useless?

many thanks!

Well, you could dedicate the 8300 to PhysX, but that's about it. I'm pretty sure you need Vista for Hybrid SLI, and even then that onboard video will only Hybrid SLI with the very slow 8400 series cards, so not worth it. You're probably best off just disabling it ^_^.