dunno i run them on standard R9 290
to be more specific it's this one
http://www.lesnumeriques.com/carte-graphique/amd-radeon-r9-290-4-go-p17329/test.htmli guess it's possible to load it on custom, i never tried it
to load it, the only way i know is this one
http://www.sapphiretech.com/presentation/product/?pid=2044#download their bios zipped file
you'll find the instruction how to update any bios the file is in power point format
and the utility is named flash.exe
but i am sure there is other way to load new bios on your GPU
perhps someone from the forum could guide you better for that
anyway i use the software given by sapphire to load bios