I had one stick of 4GB at 1333Mhz running perfectly. I bought Corsair Vengeance 1866 CL9 2x4GB to run in dual channel, but the motherboard sets it automatically to 1333. What do I need to change in my motherboard BIOS in order to get it running at 1866?
I had one stick of 4GB at 1333Mhz RAM running perfectly, but now I have bought 2x4gb Corsair Vengeance 1866 CL9 (CMZ8GX3M2A1866C9). Which is supported according to the "supported memory list" in your website about my GA-990FXA-D3.
I have entered the BIOS and have seen that my bus speed (default) is at 200 with everything at auto for my processor (I don't want to OC it). So I tried to change de DRAM multiplier, which is by auto at 6.66, which sets the RAM at 1333. I tried to change it to 9.33x (1866) but when I restart I receive a BIOS error that there is a problem caused to overclocking and it sets the multiplier back to 6.66.
After that I tried to set the bus to 233 and the multiplier to 8x (1864) but that caused the PC to do not load (couldn't even change it) so I had to replace the old RAM and the motherboard set everything to default again.
The next the step was "Ok, I will try 1600", so I simply tried to set the multiplier to 8x (1600) with the new Corsair RAM. On boot it said the same as when I tried to set it to 9.33x.
Additionally, I want to let you know that the memory is installed in dual channel in slots 1 and 2 [NO][YES][NO][YES] how your manual explains.
I would like to receive detailed instructions on how can I run my memory at the recommended frequency and timings:
I'm looking forward to your reply, I need this hardware to work properly! I need your help this time, EXPERTS! I will try to help the community with my limitated knowledge (this is pretty deep for me) if I get this resolved!
As stated above, adjust the timings to 9- 10- 9- 27 and if it still won't boot, try higher 11-11-11-30 just to see if it boots then
set the command rate to 2t for testing, if it won't boot at 2t and 11-11-11-30, might just be a bad memory stkck, test each one separately