Good morning,
I can tell you I had HP Integrated GPU and it was horrible in all versions of Trainz, The GPU could not render well, over heated, more often than not. Couldn't get out of wet paper bag fight if it wanted too.....Forgive me, I reliving my Horror with these type setups in Laptops. !!!!
I bought a ROG STIX by ASUS with NVIDIA 4 GIG VRAM, and never looked back.....Integrated GPU are bad news for Trainz..........It drove me batty........I also went from Platter HD to SSD drives in new ROG too, you won't believe the difference in boot up, file search and File Backup, as I use Carbonite....Platter Drives are super cheap now, and are great for External Drives where Backup Speed isn't an issue, but Storage is, and now there is a Glut of large Platter Drives for Cheap. And they are reliable too.....
Also doubled my RAM from 16 to 32, Mother Board Ram, it made a hell of difference in how Carbonite speed for Backup, and it allows Trainz TRS2019 to work better for me.....Definite improvement with Disk Writes, Ram Access Etc........And for me, I had to wait till last Xmas to buy my new ROG, there are plenty of other Computers, you just need to Shop and Compare.....Of course this Forum is the best Knowledge Base for what really works best in Trainz.....I am very happy with my current ROG STIX laptop, although like any Laptop, I always think the Battery is undersized but that is my thoughts only......:hehe:
Best of luck to you Sir......:wave: