820-3332-a ...

[hws]

Hi friends,

i am repairing this motherboard and i have some strange problem.

The mac after start Unigine Heaven with GPU Nvidia 650M freezes, and logout from the OS.... really only logout from the OS! I must enter the password to the OS and i can continue. The computer does NOT restart or shut down with message GPU panic as is customary. Only freezes and logout. When i start Unigine Heaven with Intel GPU, everything is ok... so, the problem is with only NVIDIA GPU.

I try replaced GPU for a new one and reballing GPU-RAM, replace U8900, but the problem is the same.

Can you anybody help me? Some idea?

Thank you very much.

 

[dukefawks]

I have had some issues with Unigine and Nvidia GPUs. I'm not sure what is going on but it may be a software issue. Try some other GFX stressing programs and see if those also make it crash.

 

[captainmac]

I assume you?re asking the guy who opened the topic here? this is an old topic but I thought I?d just add my experience to it for anyone?s future reference.
In my case it were faulty u8900s