Hello
The power supply you have pictured does not have a 5 volt output listed on it's label.
I had a blown power supply for my 323 some time ago. I described and posted how a new power supply was purchased and configured to keep the 323 alive. It's posted here at the forum.
The power supply that you have pictured does not have the needed amperage at 12 volts to power your 323. It also does not have a 5 volt output listed.
You will need a Volt Meter to confirm voltages that the power supply has.
You can purchase old power supplies at thrift (second hand) stores for much less than new. You may need to revisit a few times to find what you're looking for.
The two supplies, a 5 volt and a 12 volt supply, with the needed amperage for each, can be used. The negatives will have to be joined together and the voltages connected to the needed pins to attach to the 323.
After the box comes alive you will either have total control or you will have to return to the forum here for more info.
Hoping you have success!! Enjoy!!