Hardware Requirements for Installing SQL Server 2012

This article explains about hardware requirements for installing SQL Server 2012

SQL Server 2012 requires a minimum of 6 GB of available hard-disk space.

SQL Server 2012 requires Super-VGA (800x600) or higher resolution monitor.

Minimum Memory: Express Editions: 512 MB, All other editions: 1 GB
Recommended: Express Editions: 1 GB, All other editions: At least 4 GB.

Minimum Processor Speed: x86 Processor: 1.0 GHz OR x64 Processor: 1.4 GHz

Processor Type: x64 Processor: AMD Opteron, AMD Athlon 64, Intel Xeon with Intel EM64T support, Intel Pentium IV with EM64T support

x86 Processor: Pentium III-compatible processor or faster
Recommended: 2.0 GHz or faster

for more information go through the following link:
http://msdn.microsoft.com/en-us/library/ms143506.aspx