Artefacting / locking R7 370 - bad memory chip identification

[Jonny_Doe]

Hello everyone.

My son came to me one day saying that his pc locks up.
I found his onboard sound and gpu not working.

The gpu is an R7 370 and it has weird colors in bios and locks hard when windows/linux loads a driver for it.

I have run a diagnostic utility (a linux based app with mats/mods for nvidia and tserver/memfa for AMD) and it spew out some things.

It says error on ch7 rank 0 bit 14.
Now, i have no idea which of the 8 chips is ch7.
There are 4 chips arranged vertically to the right of the gpu and 4 horizontally on the top

I can try reflowing/reballing as i have access to some equipment but have no idea which memory chip it is.

I know that it might be a bad solder pad on the gpu and not the memory but i have to start somewhere.

[Bozog]

Re: Artefacting / locking R7 370 - bad memory chip identification

The memory channels usually go anti clockwise from the bottom right of the GPU, so I guess its the top left memory chip, and probably a cold joint or broken pad since it is only 1 bit failing.