Not Seeing More then 1 AMD Card on Rig


I have a Old Asus Motherboard with a I5 CPU and I can’t get it to See but one AMD Card on my Rig. When I boot it Show’s the Cards but it will not let me use them or read the Bios from the Card’s. Only Show Staus on One Card.
But will run Great if you have only One Card in Rig.
But I also have a Old Dell T3500 That it work’s on.

Now the Asus Motherboard will work great with Nvidia Card’s But not the AMD Card’s.

Anybody know what’s going on.

Motherboard - Asus P8B75-V
Memory - 32gb
CPU - I5-3330