Corsair VENGEANCE LPX DDR4 RAM 16GB (2x8GB) 3600MHz CL18 Intel XMP 2.0 Computer Memory - Black (CMK16GX4M2D3600C18)

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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. 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... 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.

I can try to reduce CL to 15 or 14. I haven't tried anything lower than 16 so far. Any other timings I could focus on? 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. I left out some of my early tests, and all the failed tests. I tried tweaking every timing up to row 39 'power down enable', but those last ones I couldn't get to work without spawning errors. 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.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. 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. 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.

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? Now, what bothers me is that the timings in column BG have the highest score for the x264 test. I did further tweak some other timings, which resulted in a faster Membench run, but lower fps for x264 encoding. That's kinda contradictory... The small form factor makes it ideal for smaller cases or any system where internal space is at a premium. 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. 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.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

Part of our exhaustive testing process includes performance and compatibility testing on nearly every motherboard on the market – and a few that aren’t. What is the difference between these two kits: CMK16GX4M2Z3200C16 vs. CMK16GX4M2B3200C16. I will be using it with the r7 1700 with the C6H. What kit is the best to get the highest speed on? I plan on getting 2 sets of them. Are there any other kits you recommend that can fit while using the NH-D15? 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? Blowing a little dust of this topic, cause I think I've reached the end of the line on tinkering with my RAM timings.

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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.