The ONLY time a VBIOS upgrade is needed is when the manufacturer, in this case MSI, identifies a very specific issue for your exact SKU, and issues it directly.
I never heard of upgrading a video cards firmware or BIOS before. I did find this toms hardware article though.
I looked up my Sapphire R9 290 and only found the drivers for windows.
Install MSI live update 6(utility)..
No idea,found the msi one by mistake.For sapphire,you have to request one through tech.support,don't know what other brands offer.