May 16, 2013, 12:17:12 am
Welcome to Lumion and the community.
As stucki mentions, please check which GPU is being used for Lumion. Details in this topic: Crash/Driver crash/Blue screen/"Not the same" error on laptop PCs
In regard performance with Lumion; many laptop GPU's are heavily reduced in performance in order to balance with power consumption, so many of the similar versions to desktop are only half the power of a desktop eg a 675 versus 675M.
The exception now is the 680M and MX which have much closer performance and specs to the desktop GPU. Refer NVIDIA and Passmark web sites, also I see the 675MX is much higher than the 675M.
Lumion can be pumping through a heap more polygons, textures and graphics processes/pos-t-processing than many games, but as gaming is the closest real-time environment to Lumion it is often used as a guide to specs needed.
Please refer to this post on specs for Lumion: LUMION 3: Minimum hardware requirements
The key is also to note about complexity of scenes as to what and how much can be achieved.
Quality of hardware does also have an influence, as no 2 pieces of hardware or brand produce exactly the same performance. NVIDIA cards seem to do better with Lumion. VRAM is also an important factor, the more the better.
There are many users with less spec laptops, or desktops, than you have and do manage OK. If you can swap out and improve on the GPU you have, then that will help with your experience of Lumion.