I have the realtek AC 97 sound card it works fine and everything but my brother has a Creative Sound Blaster Live 5.1 Digital Unused because his computer was to old for it to work and i was thinking of installing it but i am wondering whether to bother will it be worth it or is my sound card better any thoughts?

If it's compatible with your machine go for it

The Realtek AC'97 Onboard Sound

The Sound Blaster® Live!™