Blogulate

There are two versions of BioShock; the PC and Xbox 360 version.

Minimum Requirements

CPU - Pentium 4 - 2.4GHz Single Core processor +
RAM - 1GB
Video Card - Direct X 9.0c compliant video card with 128 MB RAM (NVIDIA 6600 or better/ATI X1300 or better, excluding ATI X1550).
Sound Card - 100% DirectX 9c compatible sound card
Hard disk space - 8GB free space

Recommended Requirements
CPU - Intel Core 2 Duo processor
RAM - 2GB
Video card - DX9 - Direct X 9.0c compliant video card with 512MB RAM (NVIDIA GeForce 7900 GT +) / DirectX10 - NVIDIA GeForce 8600+
Sound Card - Sound Blaster X-Fi series ( Optimized for use with Creative Labs EAX ADVANCED HD 4.0 or EAX ADVANCED HD 5.0 compatible sound cards)

Operating System:
Windows XP (with Service Pack 2) / Windows Vista.