.

Also, can I upgrade CPU without changing motherboard?

Can you change the processor of a PC without changing its motherboard? (Sometimes, replacing these motherboard is possible, though.) Most computer processors are socketed. This means there is a physical connector which is soldered to the motherboard and that socket can have different processors plugged into it.

Subsequently, question is, should I upgrade my CPU for gaming? If you buy a lower-end CPU, say under $200, you'll need to upgrade once every 4 or so years just to make sure things stay on the up and up. Higher-end CPUs can last much longer. For example, Intel Core i7 3770K's can still run modern games just fine because most modern games don't use more than one or two cores max.

Similarly, you may ask, is CPU worth upgrading?

As stated above, in most cases, it's not worth the money and effort. When you upgrade a CPU, it costs a lot of money. If you have to change your motherboard, RAM or other components to upgrade the CPU, it would be more affordable to just buy a new computer.

What processor should I upgrade to?

If you're primarily interested in gaming performance, you need at least a mid-range Intel Core i5 or AMD Ryzen 5 CPU. Considering that the graphics card is more important for gaming than the processor, you can save money by not getting a more powerful Core i7 or Ryzen 7 chip.