Autocad 2011 system requirements

For 32-bit:
-For windows vista or windows 7: Intel Pentium 4 or AMD Athlon dual core processor, 3.0 GHz or higher
with SSE2 technology, for Windows XP: Intel Pentium 4 or AMD Athlon dual-core processor, 1.6 GHz or higher with SSE2 technology.

• 2 GB RAM
• 1.8 GB free space for installation
• 1,024 x 768 display resolution with tru color

For 64-bit:
-Microsoft Windows 7 Enterprise, Ultimate, Processor, or Home Premium, Microsoft Windows Vista Enterprise, Business, or Ultimate (SP1 or later), or Microsoft Windows XP Professional (SP2 or later)

• 2GB RAM
• 2GB free space for installation
• 1,024 x 768 display resolution with true color
• Internet Explorer 7.0 or later