Gigabyte Z370 Aorus Gaming 3 swap - stuck in boot loop

Jan 20, 2019
Hi everyone - I'm new here but I've had my build for a couple years now. I originally started out with an MSI motherboard, but recently decided I wanted to add Thunderbolt 3 capability to my machine, so I purchased a Gigabyte motherboard and a Titan Ridge card. (This is a dual boot machine for Hackintosh and Windows 10)

I swapped the motherboard, installed my card, and double checked my work. Everything seemed to be going well until I plugged it in.

As soon as I plug in my build, (even before powering on, mind you) my 980ti makes a whirring water pump sound, which is NOT normal for when it's off. It's as if it's getting some sort of low voltage power from the motherboard. I tried unplugging the power coming from the PSU to the 980ti, but it still makes the noise even when the computer is off. If I pull it out from the motherboard slot entirely, it doesn't make the sound.

The real problem, though...
When I try to turn on the computer, I'm stuck in a 1-2 second boot loop. If I unplug the CPU power, it lasts maybe 8-9 seconds before restarting.

What I've tried:

  • Removing ram, tried different slots too
    Removing GPU, and all other cards
    Tested the PSU with the paperclip test
    Reseated CPU
    Checked to make sure motherboard is grounded properly
I haven't pulled it out of the case entirely to test it that way yet... but I'm thinking this is either CPU or motherboard related.

My build:
- CPU: i7-6700K
- GPU: GTX 980 Ti Hybrid
- MOBO: Gigabyte Z370 AORUS GAMING 3
- RAM: Crucial Ballistix Sport LT (32GB)
- SSD: Samsung 960 EVO 120gb
- POWER: Corsair 650W
- COOLING: Corsari Hydro H60

I'm stumped. Any thoughts?
Jan 20, 2019

Ha! Well, that solves my noob issue then. I'm still very new to this, so thanks for schooling me. I'll get on that!