In order for you to play Galactic Civilizations I: Ultimate Edition on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows 10 / 8 / 7 SP1 / Vista SP2 / XP SP3
Processor (CPU):
600 MHz Processor
Memory (RAM):
128 MB RAM
Graphics Card:
8 MB DirectX 8.1 Compatible Video Card
DirectX®:
8.1
Hard Drive:
700 MB HD space
Sound:
DirectX 8.1 Compatible Sound Card
In order to play Galactic Civilizations I: Ultimate Edition on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
Processor (CPU):
1 GHz Processor
Memory (RAM):
256 MB RAM
Graphics Card:
16 MB DirectX 8.1 Compatible Video Card