Details, please people, details!
My computer is stuffed with an i5 @ 3.30GHz, 8.00 GB of RAM, and an nVidia GeForce 9800 GT graphics card. Overall, it's really outdated, but BF3 runs fine on medium to high and most other games on high or ultra settings.
The CPU is good, the 8GB of RAM is decent, but I'd prefer a GeForce GTX 690, and maybe a SSD or a hybrid drive.
And of course, probably the best thing about Intel CPUs, besides the speed, is the ability to make a Hackintosh.
So what are your computers stuffed with and what is the best build for running Battlefield?