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VRAM limitation at 1920x1080 display resolution setting

Question asked by gohousejp on May 18, 2016

I implemented some code with OpenCL on AMD Radeon R9 Nano environment.

I encountered memory problem only at 1920x1080 display resolution setting.

Nano has 4GB VRAM, but vram allocation seems to be limited up to around 1.5GB only at 1920x1080.

When I run the code, gpu crash after OpenCL kernel setting, and VRAM usage is about 1.5GB at the time.

OpenCL's return value is -4(CL_MEM_OBJECT_ALLOCATION_FAILURE)

Except 1920x1080 setting(ie.1920x1200 or 1280x720...), no problem with memory allocation above 1.5GB.

Is there any limitation in 1920x1080 display resolution setting ?

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