Nforce 780a is going to launch in the last days of March, and this is Nvidia's first high-end board to feature an IGP.
The new chipset will launch toward the end of March and hits the Q1 target. The 780i is already out, while the 790i and 790i Ultra are also expected to launch this month. On the Intel side, these will be the last chipsets without IGP.
Nvidia wants to promote this switchable graphics solution and try to make high-end users care more about their power consumption.