Problems with new motherboard and GPU

So I just bought three new parts: i5 4670k, Gigabyte Z87X-D3H and MSI GTX 770.

I'm on day 2 of trying to troubleshoot why these parts aren't working.

TL;DR Issue: No display when GTX 770 is in the PCIEx16 slot (can't view BIOS or anything).

Tested Scenarios:
- Different GPU (Radeon HD 6850)-> Works.
- GTX 770 in PCIEx8 -> Works to boot and view bios, but loses picture when driver is attempted to be installed.
- GTX 770 in PCIEx16 of different motherboard -> Works.
- iGPU only -> Works

System boots when iGPU is enabled with display connected to it and device manager detects GTX 770, but still doesn't work.

Attempted Solutions:
- Fresh Windows install (8.1 Pro x64)
- BIOS Settings Tested: PCIE Gen 2, Gen 3 and Auto | Secure Boot Disabled/Enabled | iGPU Enabled/Disabled

System:
i5 4670k
Gigabyte Z87X-D3H
GTX 770
Corsair HX650W
4x4GB Corsair Vengence

When it comes to hard drives, it appears the Z87 chipset has issues with old Sandforce drives (of which I have 2 OCZ Vertex 2's) so I'd intermittently have the boot drive being detected. I've since changed my boot drive (only drive connected) to a WD Blue 320GB.

Old System (GTX 770 works fine):
Phenom II x4 955
Gigabyte 890GPA-UD3H
(Same PSU, RAM and HDD)
2 answers Last reply
More about problems motherboard gpu
  1. try to update the bios.
  2. Sorry, forgot to include that. I've tried both on the stock version F7 bios as well as the newest F8 version. They didn't have a beta bios I could find.

    EDIT: I've also now tried beta version F9a to no avail.
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