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liwoog
Adept II

4x r9-280x/sky700 6GB cards memory allocation issue

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

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1 Solution

The latest drivers 13.251.1 fixed the problem on the Sky 700 cards.

View solution in original post

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2 Replies
liwoog
Adept II

Is there anyone from AMD out there who can look into this?

uname -a:

Linux XXXXXX 2.6.32-279.19.1.el6.centos.plus.x86_64 #1 SMP Wed Dec 19 06:20:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

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The latest drivers 13.251.1 fixed the problem on the Sky 700 cards.

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