Excuse me if I insist, but the rendering engines at the two highest qualities don't use graphics card.
Therefore, the computed image will be always the same whatever your system or your computer is.

db4tech, if I program backup files, it will be active only if users check the matching option in preferences. Not sure the _bk is such a good idea though. [;)]

I know! [:)] we weren't talking about rendering a final image, just opening and displaying a model without it crashing. Unless a software rending mode was used for the interactive 3D display then x-amount of memory on a graphics card will be required, which was why I asked how much memory his card had, I wondered if it was an older (very old) graphics card the texture mapping may be exceeding the cards memory.

When it comes the producing a final render (for extra acceleration) it is a shame the GPU can't be utilized in assisting the single or multiple cores of a CPU with the intensive ray-tracing calculations.

The _bk name would more or less be invisible to the end user, it was just a naming convention to allow Sweet Home to identify a back-up file over a normal user saved file.

db4tech