memory lack problem

[mapsosa84]

hi, i do to training VRT model currently.
but reached to memory lack problem.

i used to NVIDIA RTX 2080 Ti which device memory amount is 11GB for training.
so i was adjusted batch-size from 8 to 4 and torch.utils.checkpoint used.
(use_checkpoint_attn: true, use_checkpoint_ffn: true, gt_size=256)

but arise to memory lack (cannot allocate memory).

is it possible training using RTX 2080 Ti?