new beta bios for X399 is up on ASRock site

thanks @xaltar. Yeah it only appears if the CPU is overclocked past the point of XFR being turned off. I noticed something was up when my AIDA memory and cache scores went down the further I increased core speed then turns out my clock was ticking about 20% faster, making up for the 20% loss in benchmark scores (latency scores were not affected, probably because it's measured some other way)

Anyone know how to fix the bug where my clock is ticking faster with a threadripper overclock on 1.91E? I don't use sleep mode and it's affecting my benchmark scores.

Here you go, 4 x 8GB stick of Flare X;


3333MHZ Safe V1 timings




3466MHz V1 Fast timings




3600MHz V2 Safe timings

Heard the best way to test memory stability is from a cold boot run memtest to 200% if no errors then shut down comp and do another cold boot (turn power off at the wall I assume) then rum mentest to 200% again, do this procedure 3 or 4 times and chuck in a few war reboots as well and if there is no errors in memtest then should be good.

Lots are saying with Ryzen that they can run memtest (HCI Mentest or Ramtest) to over 1000% without error but after a reboot or cold boot then memory testing will fail and give errors ....so worth a try.


@ Sonic.....good luck with 3400, I reckon it's a fat chance of getting that speed with DR 16GB sticks especially when using 64GB.....I can run 3333 with 4 x 16GB but it will always give an error with ramtest, usually before it hits 100% testing and I haven't been able to stabilize that speed yet.

Edited by lowdog - 29 May 2018 at 7:42am

Went back to P2.00 BIOS.  L1.91E added nothing for me, and made my RAM settings less stable.  Even the Safe settings stopped being stable.