BSOd 0x0124 0x0116 0x0000 reboots and gpu has stopped and recovered

Hello ive been getting a couple of problems with my custom since i got it. I keep getting 3 different bsod death errors. They are 0x0000124 0x0000000 and 0x0000116. I also get random restarts and sometimes when playing games i get application has stopped and has recovered. I get rthe bsod of death while playing youtube videos alot but oddly not when i play games the only time i remember it happening was once in gta v. I also get bsod frequently when i turn on my computer and it restarts again twice. Please help im getting really annoyed with the pc.