I have the same problem :/
my pc specs are:
nVidia GeForce GTX580 1536MB GDDR5 RAM
Intel® Core™ i7-2600K 4x3.40GHz (Turbo 3.80GHz)
Kingston HyperX 8GB DDR3-1600 RAM
It's allmost brand new and running BF3 perfect on max settings
but i would LOVE to start really dogfighting