Issues related to Threadripper 1950X and memory performance were identified.
Issues related to Threadripper 1950X and memory performance were identified.
Hello everyone,
I’m facing an issue with my Threadripper 1950X and memory speeds. My Corsair CMD128GX4M8A2666C15 8x16GB kit doesn’t work properly on 2666 CL15 at the specified 1.2V, even after trying different settings. I manage to get it partially stable, but it still causes a BSOD once a week or twice a week, which isn’t ideal since I aim for a reliable and fast system. Normally I wouldn’t hesitate to use faster RAM, but the Ryzen architecture really benefits from higher speeds.
My motherboard is an ASUS ROG ZENITH EXTREME with BIOS version 1003, which is from before the AGESA upgrade for the Threadripper 2. Should I consider upgrading my BIOS to the latest version?
The Threadripper isn’t overclocked yet (how should I even begin if the RAM doesn’t handle it well?), except for the SoC which is set to 1V, as I’ve read this can improve stability. It’s cooled by a Corsair Hydro Series H115i with two 1400 maxRPM Noctua fans.
Other components:
- 400 GB Intel 750 Series NVMe PCIe SSD (OS)
- 1000 GB Intel 6000p Series M.2 NVMe SSD (Games + Documents folders)
- GeForce Titan X 2nd Gen Maxwell
Also, the BIOS seems to ignore my settings. I entered CL15 and it shows as CL16. I’m confused.
Additionally, I set the Command Rate to 2T but still run at 1T. I attempted to raise the DIMM voltages to 1.4V for both banks, which resulted in a POST with all modules at 2666 CL15, but this caused minor stability problems—BSODs every 3-5 days (SoC voltage at 1.1V).
In the past, when the kit was new and less stable, it wouldn’t even POST with 128GB. After some BIOS updates, it finally reached 2133 CL15. Do I make a mistake? Or is this just not working properly with this configuration? :C
I was wrong to assume I needed 64 GB; I should have chosen faster RAM that’s certified for this setup.
It seems the memory kit I mentioned is listed in the motherboard’s QVL, but I’m skeptical—maybe Corsair made changes that prevent it from meeting XMP requirements.
Is there any way to make it work reliably at 2666 CL15?
No one can help here? :C
Thank you!
I strongly recommend updating the BIOS. Regarding your setup, are you using X.M.P or did you enter the settings yourself? Also, test setting the maximum voltage for your RAM to 1.35v and check if it remains stable after updating the BIOS, even without further issues.
Hi,
thank you for your suggestions. I manually entered the values as D.O.C.P., but it doesn't even POST...
I'll upgrade the BIOS and attempt it once more.
It might be a driver problem or a Windows issue—my system remains stable under heavy loads, but on lighter ones it randomly crashes and freezes applications or the entire OS.
I plan to reinstall Windows as soon as version 1809 is officially released again from scratch (with BIOS included on all stock), then try once more and share my findings.
Thanks!
I haven't reinstalled Windows yet because Microsoft hasn't released version 1809 through the Media Creation Tool yet.
These configurations appear stable after testing three FFMPEH libx264 FullHD encoding jobs running simultaneously for 15 minutes:
Ai Overclock Tuner: D.O.C.P. Standard
D.O.C.P: D.O.C.P DDR4-2667 15-17-17-35
Custom CPU Core Ratio: Auto
CPU Core Ratio: 40.00
Memory Frequency: DDR4-2666MHz
SOC Voltage: Offset 0.0875V
VCore: 1.375V fixed
DIMM Voltages: 1.375V fixed
Temperature peaked at 83°C
Should I be concerned? Would upgrading my cooling system be necessary? It's a Corsair Hydro Series H115i with two 1400 RPM Noctuas.
Cinebench score: 3357
It seems I understand the situation. Either my RAM has a faulty module or it isn't compatible because the version number isn't in the QVL list. I'll close this thread and start a new one focused on locating the fastest 64 GB RAM that fits my setup. Thanks for your patience and help.