I also ran MemTest86 a few times, and even while bumping up the voltage to 1.45V I can't get it to pass 4 runs successfully. And this I take quite seriously. Stability stays the prime focus. First of, next to the Ryzen DRAM Calc I also found some useful info and suggestions here and here. Maybe it can help someone else... What's the deal with the tRCDrd? How could I get it from 19 to the suggested 17. A higher voltage? Or do the other mentioned voltages in the calc play a role?

It may be that the CMK16GX4M2B3200C16 (Optimized for Intel) is using the less expensive and worse hynix chips (they have problems with AM4 but works good with Intel) while

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The CMK16GX4M2B3200C16 seems to be optimized for Intel boards. It runs at a slightly higher voltage than the CMK16GX4M2Z3200C16 and supports XMP 2.0. The CMK16GX4M2Z3200C16 appears to be optimized for Ryzen. Most likely, but temperature dependent. I run 1.40v and never break 40-42C, but different case environments can produce vastly different results. I specifically want the samsung b-die version (the Vengeance cost ~170€ while others ram modules like G skill Flare X or other modules with samsung b-die chip usually costs 200€+). I started extremely conservative, and after a few iterations I currently have CL16, tRCDrd 19, tRCDwr 16, tRP 16, tRAS 36. Still at 1.35V btw.

But does that 30% difference really translate to something humanly noticeable? We've all had the "wow a NVMe drive is 7 times faster than a SATA drive!" but then had the crushing disappointment of it feeling in 99% of cases just like the old SATA it replaced. I paired the Ryzen 5 3600 with an Asus Prime X470-Pro, and spent slightly more on the RAM compared to an ordinary 3200MHz CL16 set: I went for a Corsair Vengeance LPX kit at 3600MHz CL18-22-22-42. I tried getting tRCDrd under 19, but I can't get the system completely stable, even after cranking up the voltage to 1.4V which the calc suggests as max.

Throw Your Computer In The Ocean.

After reading up on RAM OC'ing a bit, I found the DRAM Calculator for Ryzen on TPU. Helpful tool, definitely! To figure out which chips are on the DIMMs, I used Thaiphoon Burned. It tells me it has Micron E dies. Every few tests I also ran a run of TechArp's x264 HD Benchmark. The avg of 4 runs are also shown at the bottom. It's free, and you could say this is a real-world test. While Membench is more a synthetic test, I guess.

It's a theory that may seems reasonable but I cannot confirm for sure in any way and would be interesting to understand the difference. If you're building a Ryzen machine, it might be a better idea to get CMK16GX4M2Z3200C16. I'd recommend just getting a 2x8 kit and running it in Dual Channel mode. There's some weirdness with this motherboard such as XMP timings and voltage being applied even though XMP is disabled. There's no way to get gear 1 working. I get the occasional boot with 3600 G2 but it's not stable. Tried auto SA voltage and manual. The small form factor makes it ideal for smaller cases or any system where internal space is at a premium.I'm sorry to revive an old thread but i'm investigating the issue and I have a theory that i could not confirm or discard as invalid. Part of our exhaustive testing process includes performance and compatibility testing on nearly every motherboard on the market – and a few that aren’t. The best high-performance systems look as good as they run. VENGEANCE LPX is available in several colors to match your motherboard, your other components, your case — or just your favorite color. For tRFC I got a bit confused with what the calc suggested: 630 and alt 560. When I look in the BIOS (well, I should say UEFI) it's set to 'auto' with an actual value of 312 (and tRFC2 192, tRFC4 132). So, that's good, right? Lower is better for this one?