Your GPU is limited a little by your processor, but you should be able to hit 25fps at that resolution, as for how long, that is unknown, dx11 is a newer technology that hasn't been fully implemented in most current titles.
as it comes stock, the 445 has enough muscle to drive any GPU. The major limit will be the GPU. However, at your resolution, you should do fine on high if you tone down the Anti-Aliasing with the 5670. In a year, you'll be able to upgrade the GPU and skip to whatever replaces the 68xx