I recently bought a nforce 590 SLi and 2x GeForce 8800GTS's and I swapped the nforce2 out for the nforce 590 not realizing that I didn't have a power supply that would handle the board and cards. I swapped the A7N8X back in and then magically my on-board sound didn't work and my DVI port on the back of my AGP GeForce 6600 didn't work either. ( I fixed the DVI problem which was a pain in the @$$) but I can't seem to get the on-board sound to work at all. The speakers and sub work find I hooked them up to my Zune and it plays fine. Any help getting it back to working condition is greatly appreciated. Thanks~!