Okay okay. Still I went from 1st PSU to 2nd wirings and now ended up with 3rd the MOSFETS.
Switching the computer PSU (22A on 12v line) to the PSU I used with my Filament extruder (16A on 12v line) did increase the overall temperature (despite it has 6A less on the 12v line) I went from 80°C to 100°C combined with using new wirings from an old flat iron (which should really do the job!). All of the above replacements helped but most likely the MOSFETs (IMHO) are the bottleneck (if I got you right on this...:) )
Switching the computer PSU (22A on 12v line) to the PSU I used with my Filament extruder (16A on 12v line) did increase the overall temperature (despite it has 6A less on the 12v line) I went from 80°C to 100°C combined with using new wirings from an old flat iron (which should really do the job!). All of the above replacements helped but most likely the MOSFETs (IMHO) are the bottleneck (if I got you right on this...:) )