Chimera and ChimeraX rendering speed with large maps and atomic models benefits from a fast graphics processor.  Calculations in Chimera and ChimeraX benefit from a fast CPU (recent i7 or i9).  And for large data, e.g. multiple 1024^3 density maps, more memory is helpful (>= 16 Gbytes).  The problem is that laptops with a fast graphics processor are horrible noisy short battery life machines, because a modern fast GPU uses more than 100 Watts of power which drains the battery fast and heats the cramped laptop.  As an example I have an MSI GS65 Stealth 15.6" 8RF laptop ($2500) that I use for showing virtual reality when I travel

I don't use it for anything besides VR because it is noisy with no battery life (< 1 hr in VR, ~2-3 hours general use) -- and I chose this as one of the quietest  high-end graphics laptops.  So if you want a laptop that has general purpose utility I think you have to accept lower performance graphics so that it is quiet with long battery life.  I don't know what Windows laptops meet those requirements.  I use Mac laptops which are all quiet with long battery life, but the current highest end graphics offered on a MacBook Pro 15" is Radeon Vega 20 which is similar to an Nvidia GTX 1050, significantly slower than the above 1 year old Windows laptops (and much faster Windows laptops with GTX 2080 graphics exist -- bring your ear plugs and fire extinguisher).  An additional factor is the weight of the fastest video gaming laptops is around 10 pounds, you would not want carry such a machine anywhere.  The MSI machine above is not too heavy, maybe 4-5 pounds, the heavier machines allow bigger batteries and more space for airflow for cooling, and produce even more noise.

  In general Chimera and ChimeraX perform quite well on normal non-video gaming laptops.  If you want higher performance get one with an Nvidia or AMD gpu with modest performance (<= GTX 1050).  Most laptops have only Intel graphics which is a few times slower (although still perfectly usable for most 3d data).

Tom