[SOLVED] New RTX 2080 Ti GPU card doesn't boot

[Mikethe3DGuy]

Just replaced an EVGA Nvidia GeForce GTX 980 Ti with a Gigabyte Aorus RTX 2080 Ti. Can't boot with the RTX card installed, it tells me to power down and connect the PCIe power cables. Both are connected - they were powering the previous card just a few minutes ago. I checked all the connectors back to the PSU (Corsair CX750M) and they're solid. Each cable has a dedicated output on the PSU. Mobo is a Gigabyte GA-Z97MX-Gaming 5.

I've tried swapping the connectors, I've checked that the new GPU is solidly seated in the Pci Express slot.

Anything else I can try, anything I'm missing?

Thanks

 

[Mikethe3DGuy]

Got it working. There were Y-adapters on the ends of the PCIe cables. I removed those and it fired up.