April 15, 2013, 12:47:33 pm
Note: your GT650M has a Passmark of only 1379
In any consideration of a PC/laptop, please give due consideration to our hardware guide on the forum at LUMION 3: Minimum hardware requirements
, and the official info on the Lumion web site - Specifications
Also, each new version (and updates) can sometimes provide more features that may have a cost of additional processing to run, for example the increase in Reflection Planes in Lumion 3.1.1+. This means then that like all things, the more power you can get for the budget or if you can extend the budget now rather than in future, the better off you should generally be.
Note that in the range of mobile GPU's, there is a significant difference in performance for the same product line in workstation GPU, due to power consumption etc drop back on the GPU. The 680M however is much closer now to its workstation brother GTX680. GeForce seems to give a slightly better performance but there is a price difference compared to Radeon.
So, the best NVIDIA card for laptop - (currently the GTX680M or MX) or AMD/ATI card (Radeon 7950 or 7970 for laptop?) will provide the most recognised performance, but also cost more.
We do have a number of users that use laptops, so hopefully some will be available to give you their views. Please also do a search with keyword laptop.