Hey guys... looking to build a vpin.  Got most of the computer parts and am wanting to do a 3 screen setup (playfield, backglass, dmd).  I would like to re-purpose an old video card and small flatscreen tv for the dmd.  Here's the question, can I install my old video card in the slot beside the new (not sli/crossfired or anything like that, just use the new one for the playfield and backglass, and use the old one for the dmd screen)?
Here is the new video card: Asus Geforce GTX660
Here is the old video card:  Asus nVidia GeForce4 MX 128Mb AGP
The motherboard:  Asus P8B75-M/CSM
And would it hurt anything to just install it and test it out?  Thanks for the help!