Thanks.I have been doing alot of research since I posted this question.
One comment I read using a sound card vs onboard audio
"I bought a high end motherboard that had hi-def 5.1 on-board sound so I initially didn't think I would benefit from this sound card. I've heard that having a sound card can improve frame rates from taking the sound rendering off the mother board so I decided to try it out since the card was inexpensive. I'm glad I did- the sound seems slightly higher quality, and I was able to change my graphics settings from high to ultra in Dirt2 after I installed the card".
I tend to take comments on Newegg with a grain of salt,but it can be helpful at times.The Logitech X-540 seem like a great solution for a 5.1 system on your pc.I read about 1000 comments between Newegg and Amazon.You cant compare this to a high end 5.1/7.1 system,but for my gaming,music,and movies this is pretty sweet for less than a 100 dollars.This is only for my pc.Many people use this on there tvs,but that's not it's intended use.70 watts of 5.1 is not made for entertainment center in your main room
Although,using this for the PS3 or X360 would get the job done. I bought it from Amazon with free shipping for 97 dollars.I read alot of comments to get a sound card for this system to avoid hissing and popping,along with better sound.Thats debatable.The problem is that I'm not going to spend 70 to 100 dollars on a sound card with a 100 dollar 5.1 system.I also read alot of reviews on sound cards,and hopefully came up with a cheaper sound card solution to suit my needs.It seems alot of the cheaper sound cards have crummy support,which goes with the territory.I found this card for 32 dollars with shipping.It seems to have little or no issues,good driver support,and gets the job done.I hope thats the case.If not,then I'm back to onboard audio.
http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16829270008I'm knocking on wood,but the GA-MA790GPT-UD3H has given me no problems.I heard the northbridge tends to run hot,but I have 2 120mm intake fans in the front,and one of these keeps NB very cool. I have a separate NIC card installed,and soon a sound card. I want to take the stress out of onboard, integration as much as possible.It seems to keep things cooler,but just a guess on my part.
Question
I looked in my add/remove programs and found the Realtek high definition audio driver.I can un-install this no problem.I know I will also need to disable onboard sound in bios.Is there any other traces or programs I need to delete to avoid conflicts, when installing the new sound card?