Tower-ing Desktop Inferno

What kind of expansion slots on the mobo?

Motherboard?
Which one?

Although, with Factory Reconditioned computers, the lot may be a mix of models brought up to the same specs. We may not be able to provide that information.

I just bought this same unit, new instead of refurbished, at Office Depot for $10 less than this price. Terrible deal woot.

Edit: Referring to the Dell.