Can't run my memory to 1866 mhz (GA-990FXA-UD3)

[dizzin9]

I recently assembled a PC and can't get my RAM to run @ 1866. I have an AMD FX 6300, Crucial Ballistix (2 x 4GB) 1866 P/N: BLT2KIT4G3D1869DT1TX0, and a GA-990FXA-UD3 rev 3.0 FC BIOS.

Made it to 1600 but I had to change my BCLK to 240. If I set the multiplier to 8 or 9.3, it doesn't do anything and defaults back to 6.67 (it IS set to 8 or 9.3 but the status still shows 6.67). I also manually put the timings to the recommended specs (9-9-9-27 @ 1.5v) and still stuck at 1333.

I've been looking around the web for an answer, hopefully somebody can help. Thank you in advance.

[Eryxx]

I'm having almost the exact same issue, trying to run 2 X 4GB Crucial rated @ 1866MHz, except in mine the BIOS keeps dropping it back to 1600MHz.

Why no answers to this question yet? Thanks for any and all advice.

[Vezina]

Board incompatibility maybe ,use the other 2 DIMM-s and see what happens.

The CPU allows 1866Mhz officially.
Set DRAM voltage to 1,65V and set the RAM speed at 1866Mhz ,no need to overclock the FSB
Also check if the Command Rate is at 1T ,if it is switch to 2T.

In UEFI BIOS you need to set both channels as such.

[AgentFXA]

Use the XMP 1800 profile and leave all the rest on auto - should work then!

[Eryxx]

Thanks for all replies, in my case the issue turned out to be EasyTune 6, every time it ran it dropped my memory from 1866 back to 1600MHz in the BIOS, no matter what settings I tried using in it. Once I disabled ET6, memory stays at 1866MHz with no issues, apparently some kind of bug in the software I ran across.

I like ET6 because it keeps my fans running quietly, yet still allows adequate cooling, hopefully my issue will be resolved in a future release.