Hi,
When we run more than 2x 6GB cards (either 4x R9-280x or 4x Sky700) in a 4 card machine, the AMD driver will not allocate more than 3GB (with 4 cards, for 3 cards, see below) per card even with the GPU_MAX_ALLOC_PERCENT and GPU_FORCE_64BIT_PTR set.
No problem with 2 cards.
Any pointers?
Thanks,
Lionel
PS: Here is the relevant clinfo when 3 Sky 700 cards are installed, I have highlighted the abnormal memory availability:
Max memory allocation: 631242752
Global memory size: 1173356544
Unified memory for Host and Device: 0
Max memory allocation: 6144655360
Global memory size: 6315573248
Unified memory for Host and Device: 0
Max memory allocation: 6144655360
Global memory size: 6315573248