Asus ROG Z270i wont boot with video card

[GameRat]

Whenever I install my GTX 1080 Founders Edition, it won't boot or post. The fans don't even turn on. If I remove the graphics card and clear the CMOS, I'm all good. Video card is working on a different motherboard.

 

[smorizio]

is the 8 pin power connected on the mb and does the mb have the newest bios file??

 

[GameRat]

is the 8 pin power connected on the mb and does the mb have the newest bios file??

Yes, the 8 pin power is connected. The board doesn't have the latest bios, only the one that came up with it.

I just tested some stuff, and looks like I have the same issue when I have the SATA drives connected to the PSU, even with no video card. First time I see something similar.

 

[GameRat]

Tested again, looks like the issue is not the card, but the power connection to the HDD.

This is what I see:
-MOBO with CPU, 32 GB RAM, Video Card and M.2 SSD = Working 100%
-As soon as I connect the power for an extra SSD, it wont post again.
-Tried different SATA ports in the PSU, and same situation
-Tried different HDD, and same situation
-Tried connecting the HDD to power, and removing the SATA cables going to the mobo, and I still have the same situation.

I'm wondering if the issue relies on the actual POWER connections for the SATA drives. Should I replace the cable?

 

[GameRat]

Problem was with the cables. I was using the cables of my other EVGA P2 PSU, and the PSU I'm using on this Mini-PC is the EVGA QC. Looks like they are not compatible. Switched the cable to the original Sata Cable that came with my QC PSU, and it works like a charm.