Set voltage manually to 1.6 then set timings to 9-9-9-25 and set to 1600 mghtz. If that doesnt work set timings back to 10-10-10-26 and unganged mode and try that but keep voltage at 1.6. You can download cpuz to see what it is rated at and what timings to change in bios.
Report back so we know how it goes.
Also visit the section titled overclocking with amd you will find alot of useful info and get more replies.
Thank you for your reply.I have contact gigabyte support and so here what they kindly reply
'' Thank you for your kindly mail and inquiry. About the issue you mentioned, due to AM3+ CPU limitation, for AMD website please click HERE. Only one DIMM per channel is supported for DDR3-1866MHz and higher speed as using an AM3+ CPU. Therefore, please install your two KHX21C11T3K2/16X memory modules into the DDR3_1 and DDR3_3 OR DDR3_2 and DDR3_4sockets.
We suggest you can press <Ctrl> + <F1> in the main menu of the BIOS Setup program to see more advanced BIOS Setup menu options. And then please enter MB Intelligent Tweaker (MIT) BIOS setup program to set "Profile1" in "DRAM E.O.C.P" BIOS item. Please do not reset/manually set any BIOS items. However, if the problems still occurs, please contact your supplier for a direct examination."
So i set profile1 .After that as you suggest and becouse kingston mems oparetes from 1.5 -1.65 v i manually set 1.610v
So after all these i am able to have a working 1866Mhz memory speed and that is 9.33 multiplyer.
I can not go to 2133Mhz.
By overclocking the FSB to 206 i am now to 1921Mhz memory speed.
Well i do beleve that i am ok but i am really wontering if i can go to 2133.Any help?
Thank you.