4GB
4gb ddr2 memory
192 Gigabytes is the maximum.
It's either 4 or 8GB. The amount of supported memory depends rather on type of chipset you have.
http://www.intel.com/support/motherboards/desktop/d945gcpe/sb/CS-027116.htm2 GB maximum total system memory
Amount of supported RAM memory.
4 GB
Until the program crashes from memory failure, and the creatures are supposed to take up a small amount of memory.
3 gigabytes
32 bit processor can access 4294967296 bit memory adderss.
16GB
16GB
You can have as many as you can fit in memory, which is dependent on size of each node, OS, amount of RAM, etc.