Graphics card 2nd port or onboard graphics

[Yammer]

Background:

I'm not a gamer, but I regularly use two monitors for Photoshop and general Windows use. I do a lot of photography and my monitors are calibrated and profiled.

I have just bought an OCUK bundle with Intel onboard graphics, which I haven't noticed in Device Manager, so I assume it's disabled. I am running the bundle with an AMD Radeon HD 7850 OC (2GB).

The question:

I am currently running two displays off the Radeon card, both on DVI cables. One is 1920x1200, the other is 1280x1024. Is this the recommended method for my usage, or would I be better to run the second display off the onboard graphics, and why?

 

[Yammer]

Never mind. I've been looking in other forums, and it seems that onboard graphics should only be used when there is no dedicated GPU.

As you were.