I just saw this, so sorry if its really late. I just upgraded to a 64 bit, 2GB dedicated graphics card, 16GB Ram, I-7 processor, dual drive (solid state), Windows 10 laptop. It is like NIGHT AND DAY! The new laptop generates an AT5 map in shaded relief in 47 minutes. I have 1500 trails, and my mapped area is about 566 sq Kilometers. One map of the whole lake! Its incredible. My finished AT5 map is 1.16GB! All I'm running on the new laptop is Reefmaster. My old one was a 32 bit, old and slow Celeron, cheap laptop without dedicated graphics and 8GM Ram that was used a lot.
*Matt recommended I get 32 GB of RAM. So far, no crashes with 16GB, but RM is all I'm running on it. Its a dedicated laptop.