Hello guys recently i bought my new graphics card r9 390.Now when i open msi afterburner it shows me that my gpu has 520 mhz on core clock and 750 mhz on memory (stock clocks are 1040mhz core and 1500 memory why this happens? and yes i tested it in some games (battlefield 4,Gta V,Black Ops 3) and the core clock in the graph it shows 520 mhz on core clock. ( http://prntscr.com/advn45 ). So guys if u can help me leave a comment down below.thanks