I have a new Biostar TA790GX A2+ with 790 chipset. I also have an older PCI Sound Balster Audigy Z2. Which should I use, the built in sound, or the 2 year old SB PCI?
Definitely the Sound Blaster. 2 years or not that card is great. It's always a better choice to use an external sound card; you'll get better sound quality and faster audio processing. If you experience problems with it i wouldn't use it though.
,AGREED! That's my card too and I loved it when I had my computer. Almost any sound card will beat onboard audio (even the fancy 8 channel blah blah). Definitely use the Audigy 2. This also helps in games since the CPU offloads the audio processing to a separate location like your card, overall increasing your framerate.