RTX 3070 artifacts: diagnostics

[novice2009]

Hi!
I'm amateur and repair graphic cards for fun. Now I have RTX 3070 from Gigabyte with artifacts. MATS had shown faulty A0, A1, B0, C0 memory chips. I replaced all of them but number of errors and faulty channels are pretty the same (with minor difference in number of errors). Before soldering new chips I checked data lines in B0 channel and found all of them good (0.3V opening voltage). Just for any case I heated up the GPU up to melting balls to restore possible bad contacts but result is the same - bad channels A0,A1,B0,C0. Does it makes sense to remove GPU, reball it and put back? Or might be there is another culprit of this malfunction?
Thank you in advance for the reply

 

[PowerBuilder]

I have seen an internet news article that Intel ARC Discrete GPU Test Labs reproduces defects just from the symptoms of artifacts that occur on the monitor screen during 3D acceleration, indicating that the GPU itself has a defect (bad). Therefore, the GPU itself may be defective (a very small defect that is difficult to find). There may be cases where defective semiconductors that are almost operational are leaked and sold (products that were temporarily abandoned because they failed the official final QC test). A long time ago, there were cases where a number of such defective AMD CPUs were leaked externally and secretly sold.

 

[CheteriagalenTriagalnik]

Could be worth an underclock, a down and dirty way to see if you can get it to become more visually stable. Past that - it really depends on whether or not you want a hobby project, as a 3070 isn't worth -that- much in 2025.

 

[eidairaman1]

Hi!
I'm amateur and repair graphic cards for fun. Now I have RTX 3070 from Gigabyte with artifacts. MATS had shown faulty A0, A1, B0, C0 memory chips. I replaced all of them but number of errors and faulty channels are pretty the same (with minor difference in number of errors). Before soldering new chips I checked data lines in B0 channel and found all of them good (0.3V opening voltage). Just for any case I heated up the GPU up to melting balls to restore possible bad contacts but result is the same - bad channels A0,A1,B0,C0. Does it makes sense to remove GPU, reball it and put back? Or might be there is another culprit of this malfunction?
Thank you in advance for the reply

Probably memory controller in the gpu die is bad

 

[novice2009]

Could be worth an underclock, a down and dirty way to see if you can get it to become more visually stable. Past that - it really depends on whether or not you want a hobby project, as a 3070 isn't worth -that- much in 2025.

Probably memory controller in the gpu die is bad

Oh no.. It sounds real and truly bad..

Probably memory controller in the gpu die is bad

If the memory controller is bad, how it usually affects error types? Just in my case MATS shows "write" errors only. Rest equal to 0.