The last we recall hearing about system requirements for Star Citizen was a couple of years ago when Cloud Imperium said their space combat game would probably share system requirements with the CryENGINE upon which it is built. A subsequent form post outlined steeper system requirements, including an 8GB RAM minimum, for the game's Dogfighting Module, but also warned that these were "not final." DSOGaming recently spoke with Sean Tracy, Engine Technical Director at Cloud Imperium Games, and promise they will post their full interview soon. In the meantime, they share his indication that system requirements like that RAM minimum will not be lowered "any time soon," and that Star Citizen will probably not support DirectX 10 graphics cards. Here's his answer when asked if the game will run on systems with less than 8 GB of RAM:

"Likely not. We are creating this game with the PC gamer in mind. Of course performance will be optimized much further than our current version of Arena Commander but I wouldn’t expect that we would drop the system requirements any time soon. Additionally on the Direct X 10 front, as almost every engine/rendering we’d like to put in relies heavily on DX11 and even DX12 or Mantle I can’t see DX10 cards even existing much longer. It’s difficult to say, but I don’t expect that the majority of gamers would even have DX10 cards anymore and so for us to continue support it wouldn’t make sense."