It means a game that use multiple gpus efficiently. So for example, if you add a 2nd gpu, ideally, it should double (within reason) you fps. If you use MSi Afterburner, the gpu usage info should hopefully be the same across all of the installed gpus and sharing the work load evenly. In the image in the spoiler tags, in the top right corner you'll GPU1 and GPU2. Both GPUs show a % of around 55~. Thats good scaling. The percentage will increase as the gpu is required to do more work and with a game that has decent scaling, that usage should stay balanced as it increases. Spoiler In this image is from MSI's gui showing gpu usage across of two gpus (for what game im not sure) and again, this is proper scaling. Thats my understanding of it anyway.