Before I upgraded to my Titan X (yay for bday presents) I had a GTX 660 SC 2GB and it worked really smooth as long as I didn’t go insane with a lot of meshes and foliage. Though I would recommend a 4GB or higher card if you can afford it. Been using AHR for a while and it’s just better and better. Also when you get a hit me up on Skype wanted to ask something.