I've got a new HP with 6GB memory and 1TB hard drive. 64 bit OS (Windows 7) and AMD Athlon II X4 630 Processor, 2.80 Ghz. Graphics card is NVIDIA GeForce 9100.
My husband (resident IT professional) says I should have plenty of capability. No problems with most other games. Maybe I'm just being impatient. The game isn't that exciting as it is. Fun, but not very sophisticated in comparison to a lot of others I've played. I'm still going to finish the game. Just wouldn't recommend it to others.