If you're planning on playing Battlefield 3 on the PC, you might just want to update your graphics card drivers before you play. Doesn't matter whether you've got Nvidia or AMD, they're both getting updates just for the year's biggest PC shooter.
Nvidia's beta drivers, minted for the Battlefield 3 beta kicking off this week, are already out, and in some cases claim to increase performance up to 38%.
AMD cards will get something similar, though these won't be out until later in the week.
While PC users should be updating their drivers regularly anyway, it's not often you see both companies come out and make such a big deal out of one game. Meaning either these drivers do work wonders or, as seems more likely, they're just using Battlefield 3's high profile as an opportunity to do a little marketing.