Hi Samuel,
what card exactly do you have? I checked google and found this one here: http://www.ianker.com/product/68UPPCIE-4SU
Mike..
I found this page here: http://www.station-drivers.com/index.php/component/search/?searchword=asmedia&searchphrase=all&Itemid=5
If you scroll down it contains some ASMedia driver for the ASM-104x higher than the ones on the ASUS website (which is Version 1.16.10.0).