I am wagering the second power supply is not turning on, the card is not receiving enough power to communicate with the computer so nothing works.

It's important to note that ATX power supplies require certain pins on the big motherboard connector to be bridged in order to "turn on", it's not just a matter of turning the switch on the back on anymore.

You have three options here:

DANGEROUS: You can jam a paperclip in to spots 14 and 15 in the connector to trigger it to turn on.

NOT DANGEROUS: buy a "power supply tester" that plugs in to that connector block and will serve the same purpose as using the paperclip.

SANE: If power is an issue (as in built in supply can't give you enough watts or you don't have enough power connectors), just put this large power supply in your computer, replacing the one that is already there.   If power isn't an issue get an adapter that converts 4-pin "molex" plugs on the power supply harness in to the 6-pin PCI-E connector (in fact, the card may have come with one).