More RAM always helps. Windows 10 is a 64-bit operating system and 64-bit operating systems will take the RAM and allocate that to applications. If there are 64-bit applications they too will use as much RAM as necessary and operate much more efficiently.
A more recent video card will provide better graphics, but you need a CPU that's capable of handling the data. An older CPU can't keep up with the much faster newer video cards and the system will not perform much faster than it already does. The other issue is power requirements. Newer video cards have different power plugs that an older power supply currently in the system may not have, and the cards may not even fit in the computer case.
To increase your page file:
Click on settings.
Click on System
Click on Advanced system settings.
Click on the Advanced tab on the small window that opens up.
Click on Settings... located under Performance.
Click on Advanced tab (a different one)
Located in the lower part is virtual memory.
Click on change.
Choose the drive where you want to set your page file (virtual memory).
Click on Custom size.
Put in the same number in both Initial size and Maximum size. This is in MB
The recommended value is 1.5 times the amount of RAM in your system. If you already have a system page file, this will be additional and this will help. I've set mine to 2 times and have had excellent results with large routes and merging.
Click on Set
This will create the page file. Reboot as requested.