Hi I just built a new system asrock b450 steel legend motherboard 16gb ram and and ryzen 5 1600 af version, I have a Asus GTX 780 from my old system when I install it I get a no signal message on the monitor but I know it works fine on the old system, I had a old GTX 460 stuck that in the new system and it works fine. I have double triple checked the 780 with the old system all working fine please can someone help thanks