Gigabyte Z87X-UD3H Error D2 (PCH initialization error)

I'm having trouble with this Gigabyte Motherboard Z87X-UD3H as first time PC builder. When I try turning on the computer the motherboard goes on reboot-loop with this error PCH initialization error and I have no clue what the problem is or what it means.
I have tried updating Bios, but when updating bios it's recommended to load optimized settings, like that after rebooting it will auto detect the new bios, but that only gets it back into the reboot-loop.
I've sent the MOBO back to dealer and they agreed it was defected, but when new mobo arrived, I get the same problem, so far 3 same model of the MOBO and all with same error.
So I guess it cant be the motherboard.
I've removed graphic card, tried other sockets. Tested all possible way of mixing/removing Memory stick.
Sent CPU for testing, report says its fine.

If anyone got any idea I would gladly take advice and try it out.
Or if you need more info just ask, I'll try my best to provide.

Here is specification of my pc parts:

Intel® Core i5-4670K Processor
Socket-LGA1150, Quad Core, 3.4GHz, 6MB, 84W, HD460

Gigabyte GA-Z87X-UD3H, Socket-1150
ATX, Z87, DDR3, 3xPCIe-x16, SLI/CFX, VGA, DVI, HDM

Memory stick
Corsair Vengeance DDR3 1600MHz 8GB CL9
Kit w/2x 4GB XMS3 modules, CL9-9-9-24, 1.5V, Low V

Power supply
Corsair TX 750M, 750W PSU
ATX 12V V2.3, 80 Plus Bronze, Modular. 4x 6+2-pin

Graphic card
Gigabyte GeForce GTX 770 2GB PhysX CUDA
PCI-Express 3.0, Windforce 3X, GDDR5, DL-DVI-I + D
9 answers Last reply Best Answer
More about gigabyte z87x ud3h error pch initialization error
  1. bump up. I really need help to solve this problem.
  2. do you have other psu for test?
  3. Yeah, I have my old PSU, the one im currently using in my old pc. Its 550W tho, that shouldnt be any problem right?
  4. any chance to get it tested on your current problem mb?
  5. any chance to get it tested on your current problem mb?
  6. I have not tried yet, been busy. I will test when I wake up tomorrow.
  7. Changing PSU didnt work :(
  8. Best answer
    sound like your mb problem .. get it to the rma ..
  9. Hi, did you solve that problem with D2 error? I have the same on UD5H with 4770....
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