Have an ATI 7970 card, with 2 Dell Monitors. Do I want to hook both monitors up via DVI cable to the 7970? Or one to the internal graphics on the Motherboard, and the main monitor to the 7970?
As has been said but just to let you know I have a 27" Dell and a 27" QNIX hooked up to my 7970. Both are 2560x1440 but I couldn't get the Dell to run at native resolution with a DVI to mini display port adapter. I had to use a dedicated DP to miniDP cable.
2560x1440 displays need dual-link DVI or DisplayPort as there are bandwidth constraints over single-link DVI / HDMI. Integrated graphics support VGA, single-link DVI, and HDMI, which is electrically compatible with DVI. So you can't use 2560x1440 monitors @ 60Hz over these interfaces. As has been said above, you'll need to connect them both to the 7970, and you'll need a DP cable for one of them as you have only a single dual-link DVI port. Some 7970s that have two DVI ports, like the MSI 7970 Lightning or the ASUS 7970 DCUII only use single-link DVI, but the ASUS includes a switch that switches between 2x single-link DVI ports and 1x dual-link DVI port, disabling the second port.
