Yes, you may need a D.O.C.P. depending on your situation.
Yes, you may need a D.O.C.P. depending on your situation.
I've experienced some challenges with my machine lately. The Ryzen 1800X paired with 16–32 GB of Corsair Vengeance 3000 RAM has been acting up after two moves. Issues often arise with MBs, especially during LAN sessions on a ROG-Strix B350-F Gaming. I upgraded to a B450-Prime, but stability problems appeared with DOCP. Now it's back to 2133 and things seem more reliable, though I haven't been able to run 4 sticks with 8 GB RAM yet. Three 8 GB sticks work fine without DOCP, and it feels more stable. As a hobbyist using Blender, I'm wondering if the difference between 2133 and DOCP matters for my needs.
Running four sticks using Zen 1's subpart imc at 3000 is a significant load. Adjust the SOC to 1.15 and DRAM to 1.35, then proceed with 2666 using docp, followed by 2933 and 3000 to verify stability. It depends on the workload—some will perform well while others won't. You can test how different memory speeds and timings impact your performance. Try the approach I mentioned above.
You may need to turn on DOCP and adjust the RAM speed to DDR4-2933 or DDR4-2666. As noted by @TofuHaroto, the first generation Ryzen lacks a strong Integrated Memory Controller. Running DDR4-3000+ will be more challenging, particularly with multiple DRAM modules.
I'll check the situation tomorrow (I've already gone down to 2933) and see what happens. If things don't work out, I might try getting all four sticks to run at 2133 or even lower the RAM speed. Since it's not a gaming setup, this shouldn't be as big of a problem for me compared to gamers.