Why reproduced result is different from the one in paper?

[SHUSHENGQIGUI]

Hi, I am reproducing the llama-7b pruning experiment, but the perplexities after pruning 70% by sparsegpt, wanda, owl w. are different from the result in paper, as table in below:

second col is my res, third col is paper's result. i wander if i miss any point or if hyperparams in this repo are different from ones in paper?