GTX 960 OC Windforce GV-N960OC-4GD randomly not detected at boot

[Antiriad]

Hi,
I have a problem with a Gigabyte GTX 960 OC Windforce GV-N960OC-4GD (rev. 1.0) on ASUS H110i Plus D3 motherboard.

MY SPECS
Case: Thermaltake Core V1
Motherboard: ASUS H110I Plus D3 (mini-ITX)
CPU: Intel Core i5-6400
RAM: Kingston HyperX FURY 8 GB, 1600 MHz, DDR3L
SSD: Samsung SSD 850 EVO, SATA III 2,5" 250 GB
GPU: GIGABYTE VGA GBT GTX960 4GB Windforce OC Rev1
PSU: Thermaltake Smart SE 630W SPS-630MPCBEU-PSU
OS: Windows 10 Home 64 bit

Sometimes (well, really often) at boot the GTX960 it's not detected at all ("no signal" on monitor, "PCIE not present" in bios) and integrated GPU is activated instead.
Forcing PCIE as primary GPU in bios, playing a bit with HDMI from integrated vga to PCI, rebooting (many times), seems to temporary fix this annoying problem, but later it occurs again and again, randomly.

I've yet flashed latest bios on mainboard and GTX, updated drivers, reseated the GPU many times, changed cables and monitor, deactivated USB ports and changed some options in BIOS (CSM, fast boot etc.) without success.
Even when GTX is not detected, fans are spinning and system boot normally (I can see it switching HDMI on integrated vga).

Of course when GTX is detected, everything work like a charm.

Any ideas? Please help, I'm going mad! :S
Thank you very much.

[AgentFXA]

Provided you do not overclock it's a cold boot problem and this usually indicates a mobo problem - however, I would swap the psu first and see how it goes.

you dint say how old your components are.   

[Antiriad]

Provided you do not overclock it's a cold boot problem and this usually indicates a mobo problem - however, I would swap the psu first and see how it goes.

you dint say how old your components are.

Hi and thank you for your answer.
My components are brand new (new setup).

I've identified the cause of the issue (HDMI or DVI or Display Port handshaking problem) and I just discovered it is widespread. Other retailers fixed it with a BIOS update:

Generic NVIDIA reference board problem
https://forums.geforce.com/forums/board/33/#4748804

ASUS fix:
https://rog.asus.com/forum/showthread.php?59850-GTX-970-980-BIOS-update-for-DisplayPort-issues/page11

There is a way to effectively point this directly to Gigabyte?
I've yet flashed latest BIOS on GPU and mainboard, but without success.
I'm *sure* Gigabyte could solve this problem with a more updated BIOS for my GPU.

Thanks

[Antiriad]

Hi,
I've actually solved my problem and I think it will be useful to share it  on the board.
Problem solved using a different HDMI cable, nevertheless the issue was *not* caused by a faulty cable (that is fully working with other devices) but by an HDMI or DVI or Display Port handshaking problem.

 I really hope my finding will be useful somehow and will be forewarded somehow to Gigabyte tech-staff.

[AgentFXA]

So you fixed a handshake problem by changing the hdmi cable?
WoW, what are you smoking?

[Antiriad]

So you fixed a handshake problem by changing the hdmi cable?
WoW, what are you smoking?

I'm simply reporting my guess and how I solved the problem, hoping to be useful to someone else.
Instead of trolling, what's your explanation?