Red Hat Linux 7.1:
Processor — Any x86 processor (minimum required); Intel Pentium or AMD-K6 (minimum recommended).
RAM — 32 MB RAM (minimum required); 64 MB RAM (minimum recommended).
Hard Drive Free Space — 650 MB (minimum required); 1.5 GB (minimum required for Workstation-class installation with GNOME and KDE; 1.2 GB with only one); 1.2 GB (minimum required for Server-class installation); 1.5 GB (minimum required for Laptop-class installation with GNOME and KDE; 1.2 GB with only one); 2.4 GB (minimum required for Custom-class installation if every package is selected); 1.2 GB (minimum required to use automatic partitioning); 3 GB (minimum recommended to allow space for updates and additional software).
http://redhat.com/support/resources/...1-install.html