AMD Voltages for DDR3-1866

[Tyerker]

Hello everyone.

The kit of RAM I have has a SPD Rating for 1866 of 9-11-9-27-1T @ 1.65V
However, even with timings like 10-12-10-30-2T @1.675V, I just can't seem to get my system to boot with the 9.33x Mult

I am able to run the system stable at 1600 MHz 8-10-8-24-1T @ 1.525V

So, my question is two-fold:
1. Would these timings at 1600 MHz be equal to or better than the SPD setting? Are the increased voltage and looser timings made up for with the frequency?
2. Would I need to alter any other voltages from stock (CPU-NB, NB, etc) in order to get it to boot at 1866? If so, which ones should I be looking at, and what are considered safe 24/7 voltages?

Thanks,
Tyerker

 

[Johan45]

We have seen some ram cause some issues with the FX platform, you also have 4 sticks which can make a bit of difference. My suggestion if you're trying to get the 1866 to work would be to up the CPU_NB voltage to 1.25-1.3v this will add some heat to your overclock. Also up the ream voltage to 1.67, it'll be fine with that voltage even up to 1.75v if you have decent airflow.

 

[Woomack]

Also set tRFC to 300-350 and Command Rate 2N manually.