Madmax slower than Chia Official App Ubuntu 18.04

Please help, I don’t understand why MadMax makes the plots slower than the official Chia app. I have tried different command lines varying the buckets, assigning from 8 to 14 threads and it doesn’t make much difference. I have a 1TB NVMe disk for temporary writing.

16gb RAM
Intel Core i7-10700K 3.80GHz 16 hilos
18 Ubuntu.04
NVMe 1TB for temp files.

Official Chia app time one Plot: 5 hrs.
MadMax time one Plot: 6 to 7.5 hrs.

These are some command lines I used:
./chia_plot -n 1 -r 14 -u 256 -t /media/jorge/NVMe/tmp/ -d /media/jorge/WD12TB-01/MadMax/ -c xxx -f yyy

./chia_plot -n 1 -r 14 -u 256 -v 128 -t /media/jorge/NVMe/tmp/ -d /media/jorge/WD12TB-01/MadMax/ -c xxx -f yyy

Thanks in advance!!

The other may correct me if I am wrong but once madmax is done, he copies the written file to the HDD. Let’s assumee your HDD allows writing at 200 mb/s. Then just copying the file will take ~ 8 minutes.

Oh I see, you need several hours to plot… Well, what is the SSD you use? My bet is, that it is some cheap QLC Memory SSD and it writes super slow after some GB.