It would be more accurate to say that SC4 is not optimized for today's hardware. It relies entirely on single-threaded performance, which has not improved appr

It would be more accurate to say that SC4 is not optimized for today's hardware. It relies entirely on single-threaded performance, which has not improved appreciably since the days when it was released. Furthermore, it is 32-bit and not large address aware, which means it is limited to about 1.5GB of memory. Needless to say, this would max out a Pentium 4 single-core system with 2GB of RAM circa mid-2000s, but it will leave your (not too) modern 4-core desktop with 8GB of RAM sitting mostly idle with lots of free memory. The game may run slow with large cities, but that's because it doesn't know how to take advantage of modern tech, not because that modern tech is being pushed to its limits.