It's an AMD AM2+ motherboard that supports the Phenom processor and as this is an Nvidia chipset you won't be surprised to learn that the emphasis is firmly on the graphics side of things.
There are three PCI Express 2.0 slots so you can use Tri-SLI provided you have the necessary budget.
The first graphics slot always gets 16 lanes of PCI Express and if you run SLI with two graphics cards the second slot also gets the full 16 lanes. If you go for Tri-SLI the second set of 16 lanes are split between the second and third slots and they get eight lanes each.
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