Ram speed

[Seb86]

hi before i start i got a amd gigabyte sniper g1 a88x motherboard with a A10 7580k fm2 cpu, i had two ddr3 4gb (8gb total) hyper x fury working at 2133 (task manager showed 1866 mhz for some reason) and cpu z shows 1072-ish (since ddr i assume that its x2 so 2150-ish), i got two spare modules of gskill sniper 8gb (16gb total) that im using right now  because i needed more ram and i didnt want to buy more sticks, so i strip the kingston for the gskill, set up the bios memory multiplier to 21.33 with A.M.P. off and X.M.P. off and cpu z shows the same 1072-ish speed but in the bios and task manager it shows 1333, not even 1866 that i had when the kingston kit was installed, inside the bios the current speed is greyed at 1333 for some reason, turning AMP or XMP on or off, even trying one off and the other on it wont change that, is there any error reading the speed with the apps or my bios isnt working with me? i flashed to the lasted bios i found on the gigabyte web.