Today i got the heatsink installed, it fits like this:
It looks messy but it works, i am glad no shorts occurred.
Running for 30 min.. (performance, max npu and gpu freq.)
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/type
soc-thermal
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
64444
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
65000
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
65000
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
66250
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
66875
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
66875
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
67500
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
68125
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
71111
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72222
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72222
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72222
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72777
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72777
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72222
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
72222
It does the job, but if there’s no air flowing through the fins, I think it can get to 75 C and stabilize.
Update:
uptime 2:06 , no airflow or ventilation:
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
75625
Update 2:
uptime 3:27, no airflow or ventilation, temp is stable now:
root@rzero-3w:/home/rock# cat /sys/devices/virtual/thermal/thermal_zone0/temp
76250