Does having 2 graphics cards improve performance?

Related questions

1. Can you use any graphics card with any motherboard?
2. Did they stop making GTX 1080?
3. Will an AMD GPU work with Intel?
4. Which is better Nvidia or Intel?
5. Are all graphics cards compatible?
6. Is GTX 1050 good for gaming?
7. Will a GTX 1060 work with my motherboard?
8. Can the GTX 1080 run 4k?
9. Is 2gb graphics card enough for gaming?
10. Can I use 2 GPU?

Tags

1. #benefits
2. #motherboard
3. #primary
4. #compatible
5. #using
6. #monitors
7. #multiple
8. #addition
9. #increased
10. #replacing
11. #performance
12. #later
13. #without
14. #benefit
15. #running
16. #graphics
17. #drive
18. #cards
19. #upgraded
20. #crossfire
21. #video