After the success of Battlefield 3 which won lot of prizes, DICE and EA currently are working on the next Engine for Battlefield 4, will be released on 2013 on PC, Xbox 360 and Playstation 3, the new FPS game seems to be very heavy compared with the third edition, that's what Johan Andersson, Rendering Architect at DICE and working on the new "Frostbite Engine" on a tweet text; saying that Battlefield 4 will require 64-Bit Operating system.
We'll have Frostbite-powered games in 2013 that will _require_ a 64-bit OS. If you are on 32-bit, great opportunity to upgrade to Windows 8
According to that statement, the guys on DICE need more resources to run thier Engine, mean a new generation of high texture quality is coming next year, in addition to care about security threats buy using NX-bit feature available on the x64 OSs, and optimization of Engine code.
Check out this work, wondering if it's 64-Bit real life based:
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