I installed window 7 into my Dell dell optiplex gx620, but i cant find the audio driver
More aboutfree download dell optiplex gx620 sound drivers
dell.com would be a good place to look
If you search the Dell site you will find the audio drivers. Unfortunately, the driver was released in 2005, long before Windows 7. This may mean the drivers are not compatible with Windows 7. Only one way to find out for sure... good luck!
FYI Gents, For those of you looking for an audio driver, I downloaded and force installed this driver from Device Manager and and it worked On Win 7 64!. Windows Vista 64-bit released 8/23/2007 http://ftp.dell.com/audio/R145149.EXE