i want to buy a r7 370 but im not sure about the brand +is there any real difference between 370 and 270x? +any x4 860k mobo compatable without bios update
Forgot your other question...
By now, all FM2+ boards should be compatible with the Athlon X4 860K w/o needing to first update the BIOS. The last one I bought back in March 2015 was already updated: http://www.msi.com/product/mb/A88XM-GAMING.html#hero-overview