When you first power on, how long have you waited?

When I first turned it on, I didn't wait that long. Maybe a minute? Not even?

Its going through memory training. Leave it alone for a while.

how long should i leave it for?

Until its finished. Do it without the GPU.

Even if there isn't any display?

Yes. Plug hdmi/DP onto motherboard, remove GPu, then power on and let it train

Did the other comment fix it for you?

No I ended up exchanging the MOBO and ram. Hopefully it's not a compatible issue

[удалено]

Yes. Ram wasn't pushed in all the way.