On the www.pcidatabase.com website you can identify the vendor and the device.
Type 14F1 to the vendor field, it gives "farshad". Click on it. At vendor details it says conexant.
Now look for 5047, and you get an exact type: "Conextant High Definition Audio-Venice 5051"
There's a download link too, which gives a file named "cnet2_sp38314_exe.exe". It's actually a cnet downloader, by running it, it saves a file named "sp38314.exe" (be sure you click "I do not accept" to the "Babylon toolbar"!!!).
I extracted this sp38314.exe, and it contains XP32 and XP64 directories, so it's probably for Windows XP. If it doesn't work, as it is, you can try to set compatibility to Windows XP SP3, and run that way.
I even visited conexant's website to see if it offers current drivers, but it's not. On the http://www.conexant.com/support/
page, it says:
" At the request of these manufacturers, Conexant does not provide end-user support or drivers for PC audio products. If you have an issue with the audio configuration in Windows 7, please contact the manufacturer of your computer. "
That's not very helpful...