So to sum it up, 44 minutes into the game, when I was going to dogmeat. When I would jump into the water my computer would turn off immediately then automatically turn back on.

Now I'm playing on Ultra, hitting close to 60 fps smoothly without issues. It wasn't until I got out of the vault that it started shutting off. And as well as when I went into the elevator I pressed esc and you know what happened it shut off.

Now my specs are.

cpu- AMD FX-8350 Black Edition Vishera 8-Core 4.0GHz (4.2GHz Turbo) Socket AM3+ 125W
gpu - GIGABYTE Radeon R9 280X GV-R928XOC-3GD REV2 3GB
motherboard - 990fxA-UD3
PSU - Thermaltake SMART Series SP-750M 750W ATX 12V V2.3 & EPS 12V SLI Ready CrossFire Ready 80 PLUS
RAM - G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866

Please help, I would love to get back into FO4