Can we still mine with 2GB Cards?

I was setting up a rig under Ubuntu to use a few 2GB cards I cad and yet I am getting:

[OPENCL]:[OPENCL]:Using platform: Using platform: AMD Accelerated Parallel ProcessingAMD Accelerated Parallel Processing

[OPENCL]:[OPENCL]:Using device: Using device: Pitcairn(OpenCL 1.2 AMD-APP (1800.11))Pitcairn
(OpenCL 1.2 AMD-APP (1800.11))
[OPENCL]:Printing program log
[OPENCL]:
[OPENCL]:Creating one big buffer for the DAG
[OPENCL]:Allocating/mapping single buffer failed with: clCreateBuffer(-61). GPU can't allocate the DAG in a single chunk. Bailing.
[OPENCL]:clEnqueueWriteBuffer(-38)
[OPENCL]:Printing program log
[OPENCL]:
[OPENCL]:Creating one big buffer for the DAG
[OPENCL]:Allocating/mapping single buffer failed with: clCreateBuffer(-61). GPU can't allocate the DAG in a single chunk. Bailing.
[OPENCL]:clEnqueueWriteBuffer(-38)

I have tried the setting:

export GPU_FORCE_64BIT_PTR="0"
export GPU_SINGLE_ALLOC_PERCENT=100
export GPU_MAX_ALLOC_PERCENT=100
export GPU_MAX_HEAP_SIZE=100
export GPU_USE_SYNC_OBJECTS=1

The DAG file is running at 1904212104 Jan 8 as of today.

Anyone got any other suggestions? I am building a new rig, using 4GB cards, is that a good idea at this point? I hate to spend an additional $100+ to get an 8 GB version if not needed for a while.

Thanks for helping a noob!