HP 8300 Elite SFF with Quad Monitors

hi,

I have been using HP8300 Elite SFF with dual monitors.  I would like to use 4.

I installed an additional graphics card, AMD C320/ATI-102-C32001(B) that was available to me and plugged in 2 monitors.

Updated BIOS setting to integrated graphics.

Only the new card and one of the new monitors is working.

What other steps do I need to take or is this configuration not supported.

thanks,

Gary