MSI shares the RealTek AC850 Audio with the Foxxconn you have, so a MSI Audio Driver
should function. Try the first one, if that doesn't fly - try the other.
MSI Audio Driver
Vitesse makes the Gig/LAN - but you have to register with them to download the driver.
You either have the VSC8201, the VSC8211, or the VSC 8221 - look closely on the
LAN Chip & you should be able to spot it, then run the appropriate driver.
Save to a 'Test' folder that you pre-locate on the 64-Bit side, Re-boot & run from there.
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ePox also shares the Lan & Audio Drivers that your board has - on their EP8KDA3J model,
and has a 64-Bit Driver Group that they offer - It just might do the trick for you.
ePox Link