Windows 7: Doubt about Realtek

Im planing to buy a 5.1 speakers for my computer
My mobo is intel dg33fb it has a alc888
when i connect my normal front speakers to the rear one in the setup i hear sounds but i don't get any sound while listening to music or watching 2 channel audio. i tried the speaker fill option. its a real crap i don't get the original sound. Is there a way to fix this problem
If this problem is unfix-able im planning to buy a cheapest 5.1 sound blaster sound card. i googled they say that the rear speaker also works like normal speakers when listening to 2 channel.
Which one is better my on-board sound card or creative sound blaster.
Please Help me.

Hi Praga, Welcome to the Forum.

If you are going to buy the speakers anyway then try them first, Make sure that you have the newest audio driver installed, It is probably best to get it from your MB manufacturers website.
If thats no good then I would try the card

Pooch

thnxx for da info
my monitor had a two builtin speakers when i tried to connect that with my onboard sound card i didnt get any sound in vista or windows 7
but i did got from windows xp
i tried the latest version of their drivers also
its working only if its a 5.1 channel source
for normal mp3 m not getting any sound from rear speakers