Just got my Crucial Ballistix 2x16GB 3200MHz CL16-18-18-36 (BL2K16G32C16U4B) for RM860 (great price?). Bought them from Amazon US. Love these micron E dies.


Max frequency i can achieve is 4200MHz @1.38V. Have yet try higher voltage.


This is the timing i get for 3800MHz 1:1 fclk based on DRAM calculator. DRAM Voltage also at 1.38V, SOC voltage at 1.09V.


Benchmark results with above settings and CPU at stock clock.



This post has been edited by steven789: Jun 16 2020, 11:22 AM

Can give us more info like which motherboard, which RAM model, the timing and frequency you attempted?

That looks like a good b-die so congrats.
But probably tRC can still tightens up a bit to 58 or 60.

Anyway, the import function in DRAM calculator may not function correctly so I usually only specify the die, rank, chipset and the speed I want to run. Then press calculate fast and safe to compare the difference. Overclocking RAM needs a lot of patience and the DRAM calculator results are just a reference.

Also, make sure you use the latest version of DRAM calculator.

It's totally safe unless you put too much voltage. Personally I don't like to go beyond 1.4V although up to 1.45V should be fine for b-die. But do check stability of your overclock with good ram test software.

You're running all core overclock at 1.42V? Many people in other forum say anything more than 1.35V will cause CPU degradation. Some even say 1.30V . So far I only dare to push my 3700x up to 1.31V only.

But your RAM are crazy fast with super low latency . B-dies are still king!

I find even PBO is very inefficient. Setting it on will increase power consumption from 65w to over 95w with very little gain in performance. So i'm still running at stock without PBO

That's why I didn't want to gamble with Samsung B-die and rather went for cheaper Micron Rev.E.

Share my 3700x OC and benchmark results here for reference:

Purchased in May 2020. Sorry as I forgot to snap a photo of the manufacturing date which can be identified on the CPU heat spreader. More recent CPUs perform better in overclocking.

Test setup:
- Motherboard: Asus x570 ROG Strix-E Gaming
- RAM: Crucial Ballistix 32GB (2x16 dual rank) at 3733MHz 16-19-16-36-58-1T
- CPU cooler: Xigmatek Red Scorpion (10 year old cooler )
- Power supply: Thermaltake Toughpower Grand RGB 650W
- Room temperature: 26.2°C


This is stock (auto) settings but CPU voltage offset at -0.0825v. Without this negative offset cinebench score usually about 4770 only.
- CPU package power: 90.183w
- CPU core power: 64.645w
- CPU (Tctl/Tdie): 63.3°C max
- Motherboard temp: 32°C
- Max boost clock (all core): 4025MHz
- Max boost clock (single core): 4400MHz



This is PBO + autoOC. CPU voltage also offset -0.0825v. Any further reduction in voltage will degrade performance
Max all core boost: 4,175MHz
Avg all core boost: 4,125MHz
CPU package power: 120.160w
CPU core power: 93.762w
CPU (Tctl/Tdie): 71.8°C max
Motherboard temp: 32°C



4.2GHz all core overclock.
CPU voltage: 1.200V (1.16V at load)
CPU package power: 91.926w
CPU core power: 65.979w
CPU (Tctl/Tdie): 64.0°C max
Motherboard temp: 32°C
OCCT tested stable (30min)
This will be the most efficient clock setting because power consumption remained at 65w (core) similar like stock settings. However, single core performance will drop so I didn't even bother testing.



4.4 GHz all core OC. OCCT tested stable for 30min.
CPU voltage: 1.31v (1.30v at load)
Additional VRM settings: LLC level 4, Current capability 140%, Switching frequency 500Hz, Power phase control Extreme.
CPU cooler fan speed: 1680rpm
CPU package power: 121.712w
CPU core power: 94.889w
CPU (Tctl/Tdie): 74.9°C max
Motherboard temp: 30°C (casing fans running at higher speed)
As you can see, this setting has very similar power consumption figures as PBO. Therefore PBO is quite inefficient.



Stability testing with OCCT. I find OCCT is very sensitive in detecting instabilty. 30min of testing is equivalent to hours and hours of Prime95.

When I see other forum, all recent Ryzen 3000 series behave better. Some can even do it at lower voltage than mine.

I don't follow the calculator exactly. I have no idea what RTT_WR do but I'm sure DRAM calculator is not a Bible. You will notice each version of the calculator has different settings.

I think you can reduce your soc voltage to just 1.10v. This can cool down CPU a bit. SOC voltage only important for fclk stability.

If I were you, I would aim for 3733MHz or 3800MHz. Ryzen CPU loves high fabric clock.

Yes, it means you might get worse timing or frequency if too much voltage.