Crytek has shared the minimum and recommended PC specs for Crysis 3, which arrives in 2013. It used to be that you could gauge the quality of somebody's gaming PC build with a simple question: "But will it run Crysis?" Starting in 2013, the new question will be: "But will it run Crysis 3?"
The lowest end PC capable of running the game will still need to have a DirectX 11 graphics card with a minimum of 1GB of RAM, which means that Crysis 3 will only run in Windows Vista or later. You'll also need at least a dual-core CPU and 2GB of RAM (3GB in Vista), though that should be less of an issue for most gamers.
Check out the full specs rundown on the game's official website. Then start planning your next hardware upgrade.