sarthak.saswat.das :
Is it possible that if we decrease the wattage of the psu, the performance will decrease?
The power provided is not so less that it will burn the system or something, Its able to run the system properly and also able to run games. The only problem is that the performance with the should be better.
https://www.youtube.com/watch?v=cGbRK6Wew-M
Check out this video, The performance of g4560 paired with gtx 1050ti should be better than this. Is the decrease in performance due to the PSU?
I remember some older GFX cards would post a message on the monitor that its in low power mode or something to that effect. If it was in a low power mode that would affect the player's FPS the user would know. There are system requirements that need to be met and to make a choice not to meet them would be the problem. I would expect crashes or other issues but not a performance decrease. The user can make changes to extend battery life if they're on a laptop and increase performance through other changes like prefer max performance in Nvidia's control panel.
I'm seeing a 75W GFX card and a 54W CPU. Maybe another 100W for everything thing else(RAM, board, fans, hard drive and the rest) It could survive with a 300W PSU. He's using a 500W PSU. You could install a 300W PSU and it would have enough power.
Since I know it has enough power I would then look to the PSU's age and quality. There is a big difference between cheap and inexpensive. A low quality or high quality PSU can fail quietly or very loudly. A quality PSU has safety features in place that protect the user's investment. I have a 1080 Ti. I have a quality PSU that exceeds its needs. I'm not going to put the other hardware in jeopardy to save money .
Let's say I wanted to put its PSU in another PC and this 300W PSU in there. No problem as long as the PSU isn't a time bomb. It's just better to be safe because we've heard the horror stories.