Issue with overclocking DDR4 RAM preventing system startup
Issue with overclocking DDR4 RAM preventing system startup
Hi,
I’m still getting this mixed up, so please help me identify where I’m going wrong.
I purchased some inexpensive RAM from Amazon or Corsair, which advertises it as a Samsung B-Die model.
The product details match: Corsair 32GB dual-ranked 2666MHz RAM with the model CMK32GX4M2A2666C16.
When I enable XMP in my BIOS and everything works fine, but when I adjusted the timings according to the 1usmus DRAM calculator for a Ryzen system using safe settings, my computer won’t boot.
Here’s what I did to try to fix it:
- Booted into BIOS with XMP enabled; system ran smoothly at 2666MHz
- Modified memory timings according to the DRAM calculator for Ryzen (using safe settings)
- Set the DRAM voltage to 1.32, based on the same calculator (safe settings)
- Adjusted the FCLK frequency to 2666/2 → 1333 instead of using auto
- Saved changes and rebooted
After that, the computer refuses to start after about 90 seconds. I turned it off and cleared my CMOS with the JBAT1 tool. Once back online, XMP works again.
Details:
- Corsair LPX CMK32GX4M2A2666C16 32GB (2x16 @ 2666MHz)
- Ryzen 7 3800X + stock Wraith Prism
- MSI x570-A PRO motherboard
- Gigabyte RX 570 graphics
- 850W power supply
My question is: am I doing something incorrect, and how can I improve the RAM timing or increase the frequency?
Also, could you share more information about the RAM specifications?
Read additional information about the RAM oc guide online, then attempt again.
Discovered more resources; consider exploring further.
Learn about RAM timings in hardware secrets.
www.hardwaresecrets.com
AMD Ryzen Memory Tweaking & Overclocking Guide
Memory overclocking greatly affects AMD Ryzen systems, yet the confusing nature of tweaking on this site, due to misinformation and missing docs, has discouraged many. We aim to remove that barrier.
www.techpowerup.com