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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.


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

Is there any limitation in 1920x1080 display resolution setting ?