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Catalyst 12.8 recognizes only 4 of 5 GPU and clGetPlatformIDs() crashes

Question asked by captian-n on Aug 29, 2012
Latest reply on Apr 19, 2013 by captian-n

It´s seems there are BUGs for multi GPU in the latest whgl driver of AMD. Only 4 GPU of 5 are correct recognized. The Catalyst 12.6 has done that correct.

Only4GPU.png

The first call to clGetPlatformIDs(0, NULL, &numPlatforms); crashes like described before in the discussion:

clGetPlatformIDs() crashes with 5 GPUs Catalyst 12.6 whql

but it happens more often now. It crashes again in the aticaldd64.dll.

stopworking.png

eventlog1.png

Is their an explicit testing for OpenCL applications with multi GPU configs (more than 4 GPU) at AMD side, because that errors happens since the new CGN architecture is released. That is my fourth post to that theme and I not the alone with that problems.

 

My Machine config is:

HP Z820

5x HD 7950 - four in a Cubix GPUXpander.

64GB RAM

Windows 7 Ult x64

 

Best regards Nils.

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