So it looks like the card is powering up now.
Good progress.
The LED light is on and the fans are spinning at full speed but the card is still not detected.
Fans spinning at 100% means the card is not detected and
Power On Self Test on your rig didn't finish.
Try this few steps:
Resetting your CMOS
Remove your RAM and Plug it again.
Remove your card then plug it again (better put it directly to PCIe 16X socket)
Then tried to boot again using your card.
I've tried this but it still isn't working.