Post resurrection sorry, but I have the same problem. Not sure why this says solved, maybe I don't understand it, but bear with me.
I've pulled the board and checked for short to ground problems on the mobo tray, but nothing. I installed my X-fi card when I got the board and never used the on-board, but now I try and use it, and the same thing. I can hear mouse/keyboard/windows loading and all that.
I have done it all correctly, uninstalling all drivers, restarting, stopping windows auto install and using the latest drivers(also bios/chipset and the rest).
I get nothing at all when sound should be playing, Ive cranked up my speakers (logi 5.1 system) and played youtube and music full blast and not even a whisper.
I also see in the windows volume control that about every 10-20 seconds a little blip of sound signal is seen in the volume bars, you know how the volume level bars fill with green color to show fluctuating sound inputs
Also in my realtek HD audio manager it shows the front panel mic jack as the saturated color icon (like something is plugged in). Since the rear panel icons have only saturated color icons for the speaker wires i have plugged in, and it shows me the popup window if i unplug and plug them in, as well as becoming grayed out when unplugged.
The mic jack icon, on the other hand, never becomes grayed out, i have unplugged the front panel jack from the board to no avail.
So since this seemed like a physical issue with the rear jack at first, the front mic glitch makes me think that there is a problem with the mobo feature that lets you reassign the front panel jack. i have tried changing the assignment of the jack with no progress either.
and unless i disable the front panel jack detection, the front panel green icon stays bold and saturated as if I have something plugged in.
I know it seems like a physical issue, but i think it has to something to do with the reassignment feature of the front panel jack connector that came with the board, i think its on all x58 boards. I just don't know where to go from here.
Any help will be greatly appreciated, I can use the x-fi, but I would really like to figure this out, is bugging me that this doesn't work. Thank you.
EVGA X-58 SLI3 board
I-7 950 @4.1 ghz
Twin EVGA GTX 570s in sli
12gb corsair XMS 3
CoolerMaster V-6 w/aerocool sharks.....(red)
Lian Li mid tower case with disc drive style hdd caddy.
64 GB SSD, (microcenter model, not much info)
1TB WD 7200 RPM HDD
320GB WD 7200 RPM HDD
COOLMAX 1000W Modular cable psu.
Sound Blaster X-Fi card(removed for troubleshooting, as well as drivers)
http://i171.photobucket.com/albums/u308/dankhimself/EVGAX58SLI3AUDIOISSUE.png
EDIT for spelling and missing info.