I have a Gigabyte Z77X-UD5H with an i7 and a nvidia gtx 670. Is there anyway to have the i7's graphics run one monitor and the 670 run another?
If your motherboard supports it, you will want to go into the BIOS and look for iGPU or similar to enable the settings. This will allow both graphic cards to be used.
My rig at home is doing the same thing. I have 4 monitors hooked up to a Radeon HD 6970 CF and a smaller monitor using the integrated graphics. Movie and/or Music is on the iGPU where as my productivity stuff is driven by the Radeon.