@crazytrain - If I can be a little critical of your purchase?
There are a few things about that build that will probably make you want to return the computer.
Any pre-built that seems a good deal price-wise, but hides the component specs like the motherboard, RAM brand/speed, WIFI card type/quality, CPU chipset series and case information etc.
is likely cutting
alot of corners in component quality. If you read the comments for the unit you bought, you'll see a few people complaining about faulty or cheap components.
You did mention that price was not an issue, so, in that case, for a good Trainz capable setup, that will also allow you to run current gen game titles, with high quality ASUS, MSI or my preferred brand, Gigabyte components and really fast RAM - you're going to be spending around 1500-3k USD, depending on your Motherboard choice, CPU series, RAM quality/speed and the graphics card you put in. You're definitely going to spend quite a bit more than for a DIY build.
This is a modified parts list for a Gigabyte component build that I specced out in early September. My original build was a total of 5700 USD. This modified totals at 1903.94 USD.
Gigabyte October 2023 crazytrain build
I used good quality mid-high components, with the idea of build longevity, power, speed and excellent graphics processing, all of which Trainz needs to run well (high FPS, full ultra)
You can build it somewhat cheaper by using a non gaming motherboard, a little slower RAM, a smaller SSD drive set, and by buying a similar GPU, like the linked RTX 3060 above in post 10. The 3060 8GB like I bought isn't showing up in their current database for some reason.
There are also cheaper cases, and water cooling setups, or you could stay with a standard air cooled unit, but there's the disadvantage of having the CPU heat trapped inside the case for alot longer than if you had a water cooled setup which directly vents ALL of the in case heat out the top of the case, as well as any intake/output fans you install on the front and back faces of your case.
You can use the list as a starting point for shopping for a prebuilt, or if you have a friend who knows PC building, go ahead and build your own. Once you have all your parts, you can build the desktop up, install the OS and test in a couple hours. It's not a difficult thing to do, but does require some researching for proper steps, safety and things like applying thermal paste and correctly installing a CPU.
Rico