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r600 uses only 256 mb video ram!

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  • nanonyme
    replied
    And it's sure that it's supposed to be 512M VRAM instead of eg 256M VRAM + 256M system RAM?

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  • bridgman
    replied
    I didn't actually expect to see that mesage (unless you had a 256 MB graphics card, of course ). How much VRAM does your card have ?

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  • curaga
    replied
    dmesg | grep VRAM

    If your kernel is new enough. (2.6.35?)

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  • bridgman
    replied
    The memory manager is in the kernel driver, so it's the same for 600g and 600c. If you hear talk about GEM/TTM that's the memory manager (and some other stuff).

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  • bridgman
    replied
    The BAR limit (aperture visible to the CPU) is 256 MB but the latest memory manager code can let the CPU access more than 256 MB by dynamically mapping it into the aperture. The GPU can always address the entire video memory anyways. I believe the 256MB limit is a PCI spec.

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  • bongmaster2
    started a topic r600 uses only 256 mb video ram!

    r600 uses only 256 mb video ram!

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    Last edited by bongmaster2; 05-13-2015, 05:08 PM.
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