Quote Originally Posted by os2wiz View Post
Well I installed my new 16 GB memory kit. G.Skill F4-4266C19D-16GTZKW. I found out quickly how mediocre my IMC is. leaving all timings at auto. I was barely able to boot into 3300mhz with total instability with very high auto timings. I backed down to 3200mhz and was able to tighten timings to 14-13-13-13-30 CR T1. I had set timings at 13-13-13-30 CR T1 and it automatically changes the first value to 14. I did the appropriate SOC voltage and dram voltage stabilizing . I passed Ycrunch memory stresser. One thing with Y Crunch I have seen over and over again is if you pass the Fast Fourier subtest you wil pass all the others. I guess it is the most stressful on the memory controller of all the exams. I am looking forward to Zen 2 to solve this memory controller problem. Am I deluded to believe it will be a substantially better IMC or is there some rational reason for optimism??
At 2666 ratio and up, CL automatically rounds to the next nearest value. 3200 CL12 looks like it would be the fastest option for you.

You may also find a DRAM hole where it will not post on a certain ratio at a given speed but will at a higher ratio or higher speed. ie. You may have 3200-3300 working, but 3300-3466 do not work, and 3466-3600 works.