For 32-Bit AutoCAD MEP 2012

• Microsoft® Windows® 7 Enterprise, Ultimate, Professional or Home Premium edition, Windows Vista® Enterprise, Business, Ultimate, or Home Premium edition (SP2), or Windows XP® Professional or Home edition (SP3 or later) (compare Windows Vista versions)
• Intel® Pentium® 4 or AMD Athlon® dual-core processor, 3.0 GHz or greater with SSE2 technology
• 2 GB RAM (3 GB RAM recommended)
• 4 GB free disk space for default installation (5 GB for full installation)
• 1,024 x 768 display with true color, (1,280 x 1,024 true color recommended)
• 128 MB graphics card (256 MB or greater recommended), Pixel Shader 3.0 or greater, Direct3D®-capable workstation-class 3D graphics card recommended (currently supported graphics cards)
• Microsoft® Internet Explorer® 7.0 or later
• Microsoft Mouse-compliant pointing device
• DVD drive (for installation only)

For 64-Bit AutoCAD MEP 2012

• Microsoft Windows 7 Enterprise, Ultimate, Professional, or Home Premium edition (SP2), Windows Vista Enterprise, Business, Ultimate, or Home Premium, or Windows XP Professional or Home edition (SP2 or later) (compare Windows Vista versions)
• Intel Pentium 4 with Intel EM64T support and SSE2 technology, Intel Xeon® with Intel EM64T support and SSE2, AMD Opteron™ with SSE2 technology, or AMD Athlon™ 64 with SSE2 technology
• 2 GB RAM (4 GB RAM recommended)
• 4 GB free disk space for default installation (5 GB for full installation)
• 1,024 x 768 display with true color (1,280 x 1,024 true color recommended)
• 128 MB graphics card; 256 MB or greater, Direct3D-capable workstation-class 3D graphics card recommended (currently supported graphics cards)
• Microsoft Internet Explorer 7.0 or later
• Microsoft Mouse-compliant pointing device
• DVD drive (for installation only)

Additional Requirements for 3D Modeling

• Windows 7 recommended
• Intel Pentium 4 processor or AMD Athlon, 3 GHz or greater, or Intel or AMD Dual Core processor, 2 GHz or greater
• 4 GB RAM or more
• 4 GB free disk space for default installation (5 GB for full install)
• 1,280 x 1,024 true color video display adapter
• 128 MB or greater graphics card (256 MB Recommended), Pixel Shader 3.0 or greater, Direct3D®-capable workstation class graphics card