PSU Problem?

[Noct1s]

Hello I need some help 

I'm about 90% sure this is my power supply but I'd like to get a couple peoples ideas first before I go and set it in stone.

The system i have has a fx8350 an asus mobo a asus DCU2 gtx 780 a few hard drives and optical drive.

The problem is when I run a benchmark like fire strike or msi  afterburner the system will lose power.

This problem does not happen when in games like BF4, Far cry 4, and crysis 3.

The CPU passes all stress tests I've tried multiple.

 

The pcu is an "ok" power suple it's 80+ rated  

 

+3.3v    +5V  +12V   +12v2   -12V  +5Vsb

  24A     18A   30A     22A     0.3A    2.5A

 

[SubTract]

what brand is the power supply and what output is it rated for?

 

Which rail do you have your GPU coming off of?

 

Benchmarks are designed to push your hardware so they do normally draw more power than running a game.

Try splitting your GPU's PCI-E power connectors across both 12V rails. It may be able to balance the required load.

[Noct1s]

there are only one 8pin and one 6pin pci power that are going into my 780

add only one line for cpu power so I have no idea what rails they are on.

and the brand is lagit called OK