@ekorz Even though you resolved your issue, using the stock PSU, here are the results of the atrax v4 test using my system that has a GTX 780ti.
First I tested JVS...
Fighting EX Layer - Crashes after I go to character select screen. Makes my system reboot.
Tekken 7 - Crashes after 1 match with a video driver message. I have attached a picture.
Tekken 7 Round 2 - Crashes on the start of the 4th match, when the Heihachi video starts. I have attached a picture.
Then I tested Fast I/O using the system exact system, on a different cab that has the same monitor as the JVS cab...
Fighting EX Layer - Crashes after I go to character select screen. Makes my system reboot (just like the JVS version).
Tekken 7 - Played all the way to the last boss with no problem, other than her murdering me because I am trash tier at the game.
Tekken 7 Round 2 - Beat the game with Geese with no issue.
Note that I had no issue using a GTX 780 on Fast I/O running any of the games listed above. I played 4 matches of Fighting EX Layer with no issues.
I am glad to hear that a new PSU solved your issue. I guess I will put in a new PSU in my system with the GTX 780ti and hopefully it fixes my issue too.