In order for you to play Galactic Civilizations II: Ultimate Edition on Windows with minimal graphics settings, your computer must meet the following requirements
Operating system:
Windows® XP SP3 / Vista™ SP2 / Windows® 7 / 8.1 / 10
Processor (CPU):
Intel® Pentium® III 1 GHz (or AMD equivalent)
Memory (RAM):
512 MB (1 GB for Windows 7 / Vista)
Hard disk space:
2 GB
Video:
64 MB DirectX 9.0c Compatible Video Card
Sound:
DirectX® 9.0c Compatible Sound Card
DirectX®:
DirectX® 9.0c
Other Requirements:
Broadband Internet connection, also to activate this game you must create a Stardock account while launching the game on Steam.