That does seem a bit low, but it’s not much lower than I would expect. With this card, you should be able to expect around medium (and a little bit of high, but no AA and probably only SSAO) at 1080p. At 720p, you could easily push it up to high, and some ultra also (no AA, but maybe 2X). But OCing would help obviously and check out the Battlefield 3 tweak guide on my channel to get your frame rate much higher, without OC or external software.