216-0810005 GPU chip replacement

[yobad]

i started replacing GPU a few months ago, and in the beginning, I had really bad time until I started to use higher temperatures from the top, at this point I found good results. success ratio 80-90%
After 2 months I had a new MacBook to replace GPU, but suddenly my temp profile start to fail again and I had success 40-50%.
bought new GPU Chips from servals supplier but it didn't change the results,

i want some guidelines to help me to make a new temp profile.
i have WDS-520
thank you

 

[2informaticos]

"bought new GPU Chips from servals supplier"
I doubt you can find REAL new chips.
This can be the reason of your problem.
All the chinese sell "NEW" chips, all reballed in fact...

 

[yobad]

Ok, what I have to do ? Do you know where to buy it? Or stop gpu replacement ?