The PC Beta is available from Jan 28th - Feb 25th.
Details on how to get it here: Battlefield Blog
Full game out March 2nd in N.A.
-Up to 32 Players on PC (24 on consoles) - Play with up to 32 players online in the biggest multiplayer Maps in Battlefield. Each with a different tactical and gameplay focus set across a variety of environments.
-Full DirectX 9, 10 & 11 Support - Immerse yourself in the Battlefield world as Frostbite engine brings tanks, helicopters and explosions to vivid life on your PC. The game will fully support Windows XP, Vista, and 7 with new tech that further improves things like lighting and shadows.
-Enhanced Gameplay - The PC version also includes wide peripheral support like Joysticks for flying, NVIDIA 3D Vision, Logitech LCD Keyboards and VoIP Support plus a variety of specific features tailored for PC play.
-Friend Support - Find your friends online with the new buddy list to see if and who is online so you can quickly join their game.
-Dedicated Ranked Server - Everyone gets non-stop action with no connection penalties based on some other player's internet. Ranked Server Provider program will give players opportunity to rent their own server(s) located in professional grade datacenters, ability to modify settings like map rotation, create reserved slots for friends or clan members, kick & Ban players, and custom name your ranked server.
-Clan Support & Private Servers - Independent Clan Tag, and ability to rent servers for hosting and controlling private password protected competitive servers with expanded control over the settings from public ranked servers.
-PC Squad Play System - Updated from previous Battlefield PC titles now gives control of your squad before heading into combat.