He just gave you a $3000 graphics card?! And a Quadro is for working with high-end 3D stuff in programs like 3ds Max, Maya, Softimage etc. It wont make 2D stuff like Photoshop run any faster, although it can display waay more colours than a normal gfx.. you'd need a very expensive high-end monitor to see it though. Your 275 is probably just as fast, or faster than the Quadro when it comes to gaming.
Summary: unless you're planning to go into the Visual Effects Industry, this card is useless to you.