iMac core i7 with 2GB vram, only 512 vram showing up

[bvz]

I have an iMac running OSX Lion. It has an AMD Radeon HD 6970M with 2048 MB of vram.


Running the trial version of indigo RT v3.0.14, it only reports that I have 512 MB of memory (see attached photo).

Is this normal or correct?

[CTZn]

Most probably a video driver limitation, updating drivers should improve or address this issue.

I am ignorant about the modalities on Apple computers; if, just like for windows, you can choose between AMD drivers and Catalyst you might expect better results from the later, reportedly.

[bvz]

Thanks for the reply. I'll look into the driver issue, though I think it might not be an option for me under OSX.