PC won't start with GPU installed

[KittenKisses]

My new pc won't start when the GPU is seated. Without the GPU it boots fine.
When the GPU is seated the fans and LED do work, but the screen stays black and i'm not able to get into the bios or into windows.

Previously I got the pc to run. However, while playing overwatch it kept crashing due to an overwatch related driver bug ("rendering device has been lost". had this issue on my old build too).
A blizzard employee instructed me to use DDU to remove my old drivers and reinstall them.

It didn't help an not only did the game keep on crashing, my pc also crashed while just in windows. And currently it won't boot with the GPU seated.

When I boot the pc dr. debug indicated that I should clear my cmos, but I tried this and it didn't help.
I'm thinking and hoping that the problem is software related.

After googling a bit I saw that updating my bios through flash drive might help, but i'm a complete computer building noob and the chance that I might brick my motherboard terrifies me.

My Build:

CPU: intel I8700k
GPU: EVGA Geforce 1080ti SC2 Gaming
Ram: G. Skill Trident Z RGB F4 3000 2x 8G
SSD: Samsung Evo 960 500G
Mob: Asrock Taichi z370

Please help me. This is my first build and a lifelong dream. Not getting it to work is very frustrating.

 

[RobCrezz]

When you are starting it with the GPU, you are moving the monitor cable to the graphics card, and not leaving it on the motherboard arent you?

 

[KittenKisses]

Yeah, I tried every combination. When it´s connected to my gpu it boots, but doesn´t display anything on screen.
When i have my gpu seated, but put the cable in my motherboard it also doesn´t display.

I recon the pc is working since my keyboard led chance. They only do this when the software of the keyboard is running

 

[Phillip Corcoran]

Regarding the "no signal" from the motherboard's integrated GPU when graphics card is seated in the slot, that's normal behaviour.

You have to physically remove the graphics card if you want the integrated GPU to work, since it's disabled automatically when a graphics card is detected in order to avoid driver & resource conflicts. So that part of your post is not a fault at all.

So that just leaves your graphics card to troubleshoot - about which I am currently clueless.

 

[KittenKisses]

I put the integrated graphics as primary, which let me boot the computer with the gpu installed so I could update the driver.
However If i revert to pcie s primary it wont post. Only a black screen.

 

[Phillip Corcoran]

Oh I should have realised your BIOS allows you to do that since I've got an ASRock board too. Ignore my previous post in that case.

 

[KittenKisses]

In my device manager it now displays a code 43 windows error with the videocard.

A possible solution could be to update the bios, but i´m super scared to do this.

 

[Phillip Corcoran]

Not POSTing with the 1080 as primary?

Sounds like it may be a PSU issue (enough power for the integrated GPU but not for a 1080Ti).

Just a guess 'cos you haven't given us any PSU details that I can see (crucially the make & model).

 

[KittenKisses]

I´m running an EVGA 750 Watt 3G psu. I think it should be sufficient.

I just checked the asrock website. They actually have a bios update for my card and one of the two only point that it updates is "enhance graphic card compatibility".

So it seems I might have to update the bios.

 

[Phillip Corcoran]

Well I've updated the BIOS on my ASRock board (to fix a warm-boot issue), went without a hitch and it did fix it.

The update you mentioned sounds very relevant to your problem, so go for it.

Good luck

 

[KittenKisses]

Thanks! And pray for me.