PSU or ....... problem

[zoa023]

WIN 10 64bit MOBO : gigabyte b450m s2h(F50 bios version), PSU: Zeus 750W (was around 20e new and i ordered a new CHIEFTEC Element 700W), GPU: Nvidia EVGA 1070 8GB CPU: Ryzen 5 5600x SSD : 240GB Kingston, no HDD. Monitor : Zowie Benq 144hz Mouse: Zowie EC2-a, keyboard: MS Industrial PRO with metal frame.
So, i have a wierd problem evolving my mouse and from last night i had a problem with keyboard aswell. 7 days ago my mouse started randomly connecting and reconnecting even on desktop and its going on for 7 days i opened the mouse and cleared it checked if cable is okay and it seems like its good. Last night i played CS:GO and midgame Keyboard and mouse started bugging, by bugging i mean mouse was really hard to move around it feels like it started working on 20%. It was like sensitivity went from 1.7 to 0.2 and keyboard was delayed. So i checked net_graph with shows me FPS var loss choke, everything was completily fine but my M and K no. After restarting my pc i went back to the game and it worked fine for the rest of the night. I was reading about ~same problems everywhere and some say its my Electric Power in house, some say its static electricity and some say my PSU is a problem, i really dont know but last night i ordered a new one. I even unplugged my cables and pressed power button on my tower to release all power from PC(i read it somewhere) and today for now everything is working fine. Even unchecked allow the pc to turn of this device to save power. And also i have a problem with dry air because of the heating element recently installed in my room. 
Thank you all for reading and trying to help, sorry for bad English. Cheers!