3950 about Memory Overclocking
3950 about Memory Overclocking
I own several systems for various reasons. Mostly, I have almost all of the 3,000 family Ryzen processors. Based on my experience, I've used different chips across all my components. I installed the 3900x on my x570 master with Trident Z Royal Samsung B die memory, which supports up to 3200MHz CL14. Using the Ryzen RAM calculator helped me reach 3600MHz with very close timing, similar to the CL14. When I added the 3950x, I attempted similar overclocking but found it doesn't perform well above the xmp profile. This raises doubts about whether the 3950x is faulty. It works fine otherwise. I'm still new to timing and memory overclocking. I'm not a beginner, nor am I a professional overclocker. I've tried various timings and voltages for the 3950x without success. Would appreciate some advice from those with more experience.
XMP simply handles the overclocking for you. The problem he faces involves his UMC or IF not tolerating the frequency increase.
I encountered issues with VDDCR SOC (Ryzen master but CLDO SoC BIOS) at 1.2 volts, which is generally above the safe threshold of 1.1 volts and can lead to cracking, sound problems, and PCIe issues.
CLDO vddp, if correct, refers to the UMC voltage and can get close to VDIMM but cannot match it exactly.
VDDP and CLDO_VDDP are different concepts—VDDP applies to RAM voltage while CLDO_VDDP relates to IMC voltage.
IF stays within 40mV is recommended for stability, according to some sources.
Here’s a spreadsheet with commonly used values.
Discussions revolve around CLDO vddg and CLDO vddp on this site.
A fresh spreadsheet has been added for others to share their overclocking results.