Finally fix it.
I followed what Asrock tech support said to do in a review on Newegg:
Dear Valued ASRock Customer,
We sincerely apologize for any inconvenience this may have caused you.
Please try following to trouble shoot the board.
Unplug the power, clear the CMOS.
Load the BIOS setting default.
Test with 1 x GPU and known good raiser card on each PCIE slot one at the time to verify all slots are working individually.
Same to raiser cards and GPU to test individually.
Populate the cards if all slots, raiser cards and GPUs are working individually.
Check the PSU is enough power for whole unit.
If you have any technical support inquiry, please contact us at
http://www.ASRock.com/Support/tsd.aspWe will assist you shortly.
Thank you
ASRock Support
Tech Support Email:
http://www.ASRock.com/Support/tsd.asp After each raiser was connected, I had to allow for 3-5 minutes for Windows to get through the log on screen, but after that it worked. That was a horrible couple of days.