AutoCAD 2013 – System Requirements
For 32-Bit AutoCAD 2013 :
-Microsoft® Windows® 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions) or Microsoft® Windows® XP Professional or Home edition (SP3 or later)
-For Windows 7: Intel® Pentium® 4 or AMD Athlon™ dual-core processor, 3.0 GHz or higher with SSE2 technology
-For Windows XP: Pentium 4 or AMD Athlon dual-core processor, 1.6 GHz or higher with SSE2 technology
-2 GB RAM (4 GB recommended)
-6 GB free disk space for installation
-1,024 x 768 display resolution with true color (1,600 x 1,050 with true color recommended)
-Microsoft® Internet Explorer® 7.0 or later web browser
-Install from download or DVD
For 64-Bit AutoCAD 2013 :
-Microsoft Windows 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions) or Microsoft Windows XP Professional (SP2 or later)
-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
-2 GB RAM (4 GB recommended)
-6 GB free space for installation
-1,024 x 768 display resolution with true color (1,600 x 1,050 with true color recommended)
-Internet Explorer 7.0 or later
-Install from download or DVD
For AutoCAD 2013 for Mac :
-Apple® Mac OS® X v10.6.8, OS X v10.7.2 or later with 64-bit Intel processor
-Apple® Mac® Pro 4.1 or later; MacBook® Pro 5.1 or later (MacBook Pro 6.1 or later recommended); iMac® 8.1 or later (iMac 11.1 or later recommended); Mac® mini 3.1 or later (Mac mini 4.1 or later recommended); MacBook Air® 2.1 or later; MacBook® 5.1 or later (MacBook 7.1 or later recommended)
-3 GB of RAM (4 GB recommended)
-2.5 GB free disk space for download and installation (3 GB recommended)
-All graphics cards on supported hardware
-1,280 x 800 display with true color (1,600 x 1,200 with true color recommended)
-All Mac OS X supported language operating systems
-Apple® Mouse, Apple Magic Mouse, Magic Trackpad, MacBook® Pro trackpad, or Microsoft-compliant mouse.
-Mac OS X-compliant printer
Additional Requirements for 3D Modeling (All Configurations) :
-Pentium 4 or Athlon processor, 3 GHz or greater or Intel or AMD dual-core processor, 2 GHz or greater
-4 GB RAM or more
-6 GB hard disk space available in addition to free space required for installation
-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 .