Originally Posted by bardacuda
I watched the video but it looked like you were measuring the back of the chokes or caps. If your IR thermometer is anything like mine, it actually measures the temp about 3/4" "below" where the laser is, but you had the unit rotated to the left, so I think it was measuring the temp to the right of the laser.
Maybe I just find it hard to believe the heatsink could be that ineffective. I could see if there were fets on the low side that didn't have a sink/airflow on them but that wasn't the case for that board as far as I could tell. I really think the sensor might be reporting choke temps.
If you noticed parts of the vrm run hotter. It seems that the reference point for temps is...peak hottest.
I noticed similar on taichi....parts of the vrm run hotter. Its not even all the way around albeit cooler there are hotter areas.
Taichi was hotter near the doubler where the soc/vcore heatsinks meet. 2 of the vcore fets actually sit under soc heatsink i believe...
K7 hotter completely opposite at the very end of vcore vrm sink.
My biggest concern since i run on a bench is some user with poor airflow in a case with no active cooling on vrm..
I always have to keep this is mind versus how i test.
I have yet to pop a fet on any board but at this point if i did on ln2 i could 90% nail which fet popped while benching on ln2 before removing sink to verify.
This is normal procedure for me.
I hammer boards extensively on air prior to cold testing to see if they are worth my time.
If i have to rma something it needs to be pre cold...once i prep board rma is not an option.. only a person of poor character rmas a board they ran on ln2...
I have connections and can ask...but im honest...hey i ran on ln2 it died....can you replace it? Yes/no if no go buy another.
Many times answer has been yes but write this on rma slip....
Currently the only board worth the time cold is ch6.
Taichi and k7 have to many bios issues.
Hardware wise i am not to concerned...both should hold up....current bios on both would make benching infuriating however and a waste of ln2.
When you see the board under my phase change unit....its ready...Edited by chew* - 4/28/17 at 6:25am