At least 20 GB of physical disk space for a default installation.
Once the base OS is installed via the ISO, you can maintain your system using these secondary sources: AIX 7.3 Release Notes - IBM download aix 7.3 iso
Visit the IBM Entitled Systems Support website and sign in with your IBMid. At least 20 GB of physical disk space
Your IBM Power Systems hardware must have a current and valid maintenance contract linked to your IBMid. download aix 7.3 iso
A absolute minimum of 2 GB RAM , though 4 GB is highly recommended for migration installations.
Click on "My Entitled Software" in the main menu, then select "Software Downloads" .
64-bit Common Hardware Reference Platform (CHRP) machines running POWER8, POWER9, Power10, or Power11 processors in POWER8 (or later) compatibility mode.