I used the exact same 2560x1440 settings as the closed beta and the framerate was wavering between 52 and 60 fps on a v-synced 60 Hz monitor. This was enough to make the gameplay feel decidedly "off". Neither the GPU nor CPU were being stressed either (though the GPU clock was hitting 2,050 MHz). Very disappointing. Will check it out some more over the weekend (the open beta runs to the 12th with the game released on 14th).