What's the best way to determine my videocard's AGP slot type?

So I got a new computer. well actually, it’s a corporate throwaway. But I want to swap out some parts and build an uber system plus a sidekick.
While the slot looks compatible, I dare not short out my motherboard by simply swaping out the videocards.

Is there a way to find the specifics of either my motherboard?

I’m sorta hoping someone will tell me that an AGPx2 cards and AGPx8 cards (or what have u) are like RAM and will not be able to plug into devices they’re not suited for . if that is the case, then woo hoo! if not – please spare any Nike slogan you were thinking of typing… thanks!