Yah, my card I think is only 2 gigs.
For the most part, it handles BL just fine. Just some bigger maps are pretty bad.
I wonder if upgrading to 8 gigs of RAM will help. I also could stand a CPU upgrade. I've already ordered an LGA 1150 socket motherboard and 8 gigs of RAM, but it will be a while before I can afford the actual CPU.