No, the 9xx chipsets don't have an IGP. You will need a graphics card.
The Gigabytes aren't compatible with SLI -- that requires x8/x8 PCIe. The boards you list only have x4 for the second slot. You'd have to spend a bit more for SLI.
I'd recommend a GTX 570 or Radeon 6950 for 1920x1080 (1080p) gaming. I would also recommend a mainboard that can do CrossFire or SLI for the more demanding games now and in the future.