F3-16000CL9T-3GBPI-B Can't get 2000MHz on DFI UT X58-T3eH8

[MarkJohnson]

I have 4.0 GHz (200 x 20) and memory/uncore at 1333/2666 (2:10) and it won't stablize any higher than 3.9GHz (195 x 20) memory at 1950MHz. If I lower memory/uncore to 1066/2133 (2:8) and have 4.0 GHz (200 x 20) then it's stable just fine, so it's not the overclock.

Any hints on hitting 2000MHz on these sticks? I've tried various volt setting with no luck. NB to 1.7v, qpi to 1.5v, vcore to 1.4250. Not sure what else to try.

tRFC is set to 88. I tried both cas 2 and 1. it defaults to 1 on auto.

Thanks for any help.
-=Mark=-

[MarkJohnson]

Here are my memory timings taken from CPU-Tweaker.



I also notice my CPU multiplier goes from 20x to 12x and usually crashes. I have set vtt to 1.61v and it runs for a while, but it doesn't crash, it just slows down to 12x even though I have the speedstep and c1e disabled it CPU. must be some built-in safety mechanism or something.

[G.SKILL]

please try to run with 143/2000
since the memory controller is in CPU now, it would be much more difficult to run 200/2000 than 143/2000
thanks


G.S