As a general requirement, 2 GB of disk space is required for installation and 8 GB of RAM is recommended for reasonable performance.
Furthermore, a minimum of 50 GB of free disk space and preferably use of an SSD (solid state disk) is recommended for running Thermo-Calc and its SDKs. Not all calculation types require this much free disk space, but some rely heavily on saving and reading files from the hard drive, particularly Process Metallurgy Module calculations.