About model convergence

[yuan0713]

Hi,
How can I determine if SR3 model has converged?
I'm training a model on FFHQ and using CelebA-HQ for validation, the results for each epoch are not consistent.
Like:
INFO: <epoch: 38, iter: 650,000> psnr: 2.4686e+01
INFO: <epoch: 39, iter: 660,000> psnr: 2.5092e+01
INFO: <epoch: 39, iter: 670,000> psnr: 2.4681e+01
INFO: <epoch: 40, iter: 680,000> psnr: 2.4613e+01
INFO: <epoch: 41, iter: 690,000> psnr: 2.4460e+01
INFO: <epoch: 41, iter: 700,000> psnr: 2.4871e+01
INFO: <epoch: 42, iter: 710,000> psnr: 2.5073e+01

Should I choose the best results as my final outcome?

Thanks!