The map obtained using reppoints_moment_r50_fpn_1x.py training is 0.378

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I currently use 2 sets of 2080TI to set imgs_per_gpu = 4, the others are unchanged, lr_config = dict (policy = 'step', warmup = 'linear', warmup_iters = 500, warmup_ratio = 1.0 / 3, step = [8, 11]), total_epochs = 12, the map is 0.378 after training.
I used a 2080TI, imgs_per_gpu = 5, and got Map = 0.372 in training.
There is still a big gap from the 38.2 given.what should I do?