Assassin’s Creed IV PC Requirements Also Revealed–Only Supports 64-bit OSs

Assassin’s Creed IV: Black Flag PC System Requirements:

Minimum configuration:

-Operating System: Windows Vista SP or Windows 7 SP1 or Windows 8 (both 32/64bit versions)
-Note that we only support 64 bit OSs.
-Processor: Intel Core2Quad Q8400 @ 2.6 GHz or AMD Athlon II X4 620 @ 2.6 GHz
-RAM: 2GB for Windows Vista, Windows 7, Windows 8
-Video card: Nvidia GeForce GTX 260 or AMD Radeon HD 4870 (512MB VRAM with Shader Model 4.0 or higher)
-DirectX: DirectX June 2010 Redistributable
-Disk Space: 30 Gb
-Sound: DirectX Compatible Sound Card with latest drivers
-Peripherals: Windows-compatible keyboard and mouse required, optional controller

Recommended configuration:

-Operating System: Windows Vista SP2 or Windows 7 SP1 or Windows 8 (both 32/64bit versions)
-Note that we only support 64 bit OSs.
-Processor: Intel Core i5 2400S @ 2.5 GHz or AMD Phenom II x4 940 @ 3.0 GHz or better
-RAM: 4GB or more
-Video card: Nvidia GeForce GTX 470 or AMD Radeon HD 5850 (1024MB VRAM with Shader Model 5.0) or better

Supported video cards at the time of release: Nvidia GeForce GTX 260 or better, GT400, GT500, GT600, GT700 series or AMD Radeon HD4870 or better, HD5000, HD6000, HD7000 series
- Note: Latest GeForce drivers tested: 320.49 for all series. Latest Radeon drivers tested: 13.1 for Radeon HD4000, 13.4 for Radeon HD5000 and above.
- Laptop versions of these cards may work but are NOT officially supported.

Source: Uplay