Hi folks!

I'm trying to determine when I've hit the "It's too much new graphics card for the hardware" stage with my son's R3.  We have upgraded to the hilt on this thing and he wants to squeeze the last little bit out of it.  I just bought him a EVGA GeForce RTX 2080 card and when we turn on the system we see the BIOS post, but can't get into the BIOS, then the screen goes dark and we get single beeps spaced about 1 minute apart.  Thoughts?

Have I finally gone and exceeded what that system will handle in its' default MB state?  Does anyone have any recent knowledge with any of the newer 1080/4k cards??  Any help would be greatly appreciated!  Thanks!