Separate video cards for dual monitor?

[walkman]

I have an 8800GT video card for my dual monitor setup.

I'm thinking of purchasing a 260/216 so I can better game on my primary monitor. Does it make sense to run both video cards and have the 8800GT be dedicated to my secondary monitor?

 

[Lonyo]

Not really.
Just adds more heat/wastes power, unless you plan to use it for PhysX stuff.

 

[LokutusofBorg]

I've been running dual monitors off a single video card for a long time, and never had a need to use a second card. Gaming works just fine and I get the expected performance.

 

[walkman]

So from a performance perspective it makes no sense unless running PhysX?

Does anyone run 2 cards so they can calibrate both monitors?