Ryzen - Return of the Jedi

[BeepBeep2]

What is the fastest memory speed recorded with Ryzen? I felt stymied with my dual rank 32 GB memory kit (B-die) ddr4 3200 running at 3066nhz. I decided to buy a Gskill single rank 16GB kit at 4266mhz with timings 19-19-19-36 . I plan on downclocking it at 3733mhz at 15-15-15-32 or 15-15-15-30 if possible with CR T1. Is it very crucial for performance to disable geardown, as you wind up with a T2 command rate, which has to impair performance somewhat? I hope my plan is feasible.

Unless you are extremely lucky with your IMC and RAM, there is probably no way you'll be able to run 3733 MHz at CAS 15. 3600 CAS 16 might be feasible on single rank.

I've seen a few people have 3600 stable and have seen AIDA / boot at 4000 on one CPU so far but most people are between 3000-3200 or 3466.

I have done 9-8-8 2666 but...it was sketchy.
Speeds i run are dictated by cpu when sub 0. I tried higher and looser. Would not boot.
Once I know speed it likes i just make due and dial in performance @ that given speed.

Os2wiz think someone broke 4000 on single stick on a gigabyte. I am more of a performance oriented mind then a suicide run kind of guy however.

How bad is your IMC on LN2? 2666 max? I was having issues booting above 2400 on B-die below -60 all the way down to full pot over the weekend. Boot up to 3600, not stable, 3200 runs 32M CL12. CLR CMOS / ASUS Safe Boot don't help with the CBB. Code 55 or code 8 no ram / no cpu. Tried diff proc ODT as well. By the time I got 2666 booting I was getting multiplier locked at 5.5x