AutoCAD 2013 System Requirements for 32-bit :
Operating System : Windows 8 Standard, Enterprise, or Professional edition (requires installation of AutoCAD 2013 Service Pack 2), Windows® 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions); or Windows® XP Professional or Home edition (SP3 or later)
Processor : Windows 7 : Intel Pentium 4 or AMD Athlon dual-core processor, 3.0 GHz or higher with SSE2 technology
Windows XP : intel Pentium 4 or AMD Athlon dual-core processor, 1.6 GHz or higher with SSE2 technology
HDD : 6 GB free hard disk space for installation
RAM : 2 GB ( 4 GB recommended)
Resolution :1,024 x 768 display resolution with true color (1,600 x 1,050 with true color recommended)
System Requirements for 64-bit :
Operating System :Windows 8 Standard, Enterprise, or Professional edition (requires installation of AutoCAD 2013 Service Pack 2), Microsoft Windows 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions), or Microsoft Windows XP Professional (SP2 or later)
Processor : AMD Athlon 64 with SSE2 technology, AMD Opteron® processor with SSE2 technology, Intel® Xeon® processor with Intel EM64T support and SSE2 technology, or Intel Pentium 4 with Intel EM64T support and SSE2 technology
HDD : 6 GB free hard disk space for installation
RAM : 2 GB ( 4 GB recommended)
Resolution :1,024 x 768 display resolution with true color (1,600 x 1,050 with true color recommended)
Additional Requirements for 3D Modeling (All Configurations)
Processor : Intel Pentium 4 or Athlon processor, 3 GHz or greater or Intel or AMD dual-core processor, 2 GHz or greater
HDD : 6 GB hard disk space available in addition to free space required for installation
RAM : 4 GB RAM or more
Resolution : 1,280 x 1,024 true color video display adapter 128 MB or greater, Pixel Shader 3.0 or greater, Microsoft Direct3D capable workstation-class graphics card
