If no popular game engines are recommended, then what graphics card upgrades are?
Your processor is from 2010. https://ark.intel.com/content/www/us/en/ark/products/43546/intel-core-i5-650-processor-4m-cache-3-20...
If your OS is windows 10, then your processor and graphics are not supported.
There are no "upgrades". If you have a desktop PC, then you can "try" and find a "compatible" add-on graphics card.