AnsweredAssumed Answered

2290wx pbo and ram

Question asked by jbmerrill on Jun 12, 2020
Latest reply on Jun 13, 2020 by jbmerrill


I am unable to get my RAM to be stable above 2666Mhz with either Performance Boost Overdrive, or Performance Enhancer (Level3) enabled.  From what I know, these are preferred to manual static O.C.  I get frequent random O.S. crashes and Cinebench crashes the computer immediately.  I  have tried everything I can think of including DRAM and SoC voltage increases, Load Line Calibration, Looser RAM timings and various other settings to no avail.


Below is a snippit from a posting about someone with the same problem, but he was able to solve it by finding a UEFI setting on his ASUS motherboard.


I am looking for advice on some UEFI settings that may be similar or other to help me be able to run my RAM at a higher speed while also using PBO or Perf Enhancer. I have a single very high quality 128GB (8x16GB) G.skill 3200Mhz C14 Quad channel RAM kit (Samsung B-dies) that should be able to function at 2933Mhz, (used to work with the 2950x), but won't.


I upgraded my CPU recently from a 2950x to a 2990wx and this is when the problems began, so there is probably something to do with the 2990wx memory controller causing this. I have tested each of my RAM modules individually, and they all test good. Also, when I only run 1/2 the RAM (64GB), everything seems to run just fine with both PBO/Enhancer and 2933Mhz RAM.


I am able to run the RAM at 2933, but not if I O.C. the CPU (PBO).


Following is the snippit about the ASUS Motherboard UEFI settings:


Apr '19
Time for a sunshine update!


Me and a friend spent all evening in and out of BIOS and AIDA64, refusing to accept the 1833mhz clockspeed. Accidentally we stumbled across the ?RAM Current Capability (CHA, CHB)??and ??CHC, CHD)??which has a tooltip that says something along the lines of ?ncrease this value if you?e stresstesting the memory or if you?e running high density configurations?? This setting can be found inside ?weakers paradise??in the BIOS, and so naturally we went ahead and ramped the value up from 100% to 120% and gave 2133mhz a go with 14-14-14-34 timings.


Everything went fine, and we continued to increase incrementally until finally we hit 2933mhz at 14-14-14-34. It is stable enough to continuously run AIDA64 benchmarks, which is all I was hoping for basically. I could do a memtest86 run as well, but honestly I don? want to waste a whole day doing that.


Over to the fun part! AIDA64 memory benchmarks running at 2933mhz with 14-14-14-34 timings:
End Snippit


So, if there is anything you can advice me on for this to get it to work, I would be extremely grateful. Please let me know what additional info. you may need from me.


Thank you
Asrock X399 Pro Gaming, 2990wx Threadripper,128GB G.Skill RGB 3200 C14,EVGA 1200 P2,EVGA GTX 1080 Ti x 2 SLI, Enermax Liqtech 360mm,Samsung 970 EVO/960 Pro/850 EVOs, Toshiba x300 HDDs, Thermaltake Chaser MK-1