Hi Roberto
The list for unsupported graphics cards is just for Discovery Explore stage. For Explore mode to work, you need minimum 4GB dedicated GPU RAM, while 8GB GPU is recommended and when running under Discovery Modeling at least 2 GB of discrete video memory is required (4+ GB recommended).
For SpaceClaim: Discrete graphics card with the latest drivers and compatible with the supported operating systems. For full functionality, use of a recent NVIDIA Quadro or AMD Radeon Pro card with at least 1 GB of discrete video memory and supporting, at a minimum, OpenGL version 4.5, DirectX 11, Shader Model 5.0.
Sorry for the confusion, in this case the cause for the error might be because the dedicated card is under 1Gb.
Let me know if you have any further questions on this.
Thanks & Regards.