firepony: Fix batch size selection for 4GB GPUs
firepony: Fix batch size selection for 4GB GPUs

NVlabs/firepony,broadinstitute/firepony,NVlabs/firepony,broadinstitute/firepony,broadinstitute/firepony,NVlabs/firepony,NVlabs/firepony,broadinstitute/firepony