Ryzen Threadripper 2990WX, 2970WX, 2950X, 2920X owners club

Yeah I'm running good sticks, but they are 4 x 16GB sticks. I could *theoretically* try 32GB (4 x 8GB) of different RAM (3600 CL15-15-15-35), but I doubt it would make any difference. I'm either going to attempt 3466, or just be happy at 3200 with tight timings. If I start to feel bad about the low RAM speed, I'll just run some disk benchmarks on my new 6TB NVME RAID0 array to make myself feel better.

Both types of RAM you mentioned smell a lot like Sammy B die ?! The 32GB 4x8 / 3600 / CL15 is probably are a smidgen faster (not just because of the CL, but 16GB per stick is a bit trickier than 8GB per stick). Still, at the end of the day, a 16c/32t 2950X, 64 GB 4x16 RAM plus 6TB NVME RAID0 sounds like just the fiddle-ticket for that long Ontario winter (I am on CDN's West Coast but used to live in Ontabrrrrio)

You made the right decision by heading west, LOL! I figure almost every RAM kit I have is Samsung B-die (since I always opt for performance over cost), but I think it's obvious that this generation TR's IMC can't do 3600. I'm sure the new ones can, just like X570 CPUs can now do 3600 DOCHP, where that was impossible on X470.

...same here , Sammy-B is my go-to RAM for almost all my builds...less headache, more 'oc' As per earlier pic, I can reach 3600 on the TR2 but for the extra 133MHz, I have to loosen timings...I might revisit that during the holidays (avoiding too much turkey ). Also, the performance difference between 3400 and 3466 is very minor.

I trust you have tried this excellent tool ? https://www.overclock.net/forum/13-a...ram-bench.html

I've tried it, and honestly didn't like it. It spit out weird timings I knew my RAM couldn't do, so I wouldn't trust it. But it might be worth revisiting, since I know that guy works hard on that tool, so maybe the old version I was using was buggy. I really don't enjoy OCing like I used to, so I tend to avoid stuff like this until I have to. Like now. These days as an old guy, stability is priority #1. Squeezing every last bit of performance out of it isn't worth the hassle, unless you really enjoy the tinkering part of it. Thanks for the heads up, I will take a look at the latest version of that tool.

I didn't try the 1usmus tool until version 1.6, well after I had already established a stable RAM, and by that time, the tool was quite mature and very helpful, if just to confirm things. And while I have done a lot of oc'ing, including with LN2, I also reached the age whereby spending three weeks on troubleshooting one particular obscure RAM timing parameter doesn't really makes sense, especially as RAM oc'ing still involves a certain amount of 'voodoo'...

Most reviews I have read seem to suggest that tight 3200 RAM is the sweet-spot. If/when you can reach that with your 16GB modules for 64GB on 2950X, it's eggnog time !

Nice, I'll keep that in mind. Silicon lottery is still a factor too, and AMD CPUs can be downright weird. My original 1st gen Ryzen 1700 wouldn't run RAM at 3200 no matter what, tried multiple kits, but for some reason 3466 was just fine (discovered that purely by accident LOL). Currently I have the ram manually set to 3200, and I manually input every single number from the DOCP 3600 timings, just to play safe. Once I get the loop set up properly, I'll start with looking at the timings.

...Silicone lottery is always omnipresent...but really, I probably learned more with the slouchy pig oc chips (my old nemesis >> 5960x comes to mind) than the smooth operators, like the current 2950x. Also, you're right about the 'weird' RAM multipliers w/ TR2...3400 ok, 3466 ok, 3600ok, but 3533 not ok at any setting whatsoever ...of course, it could be all in the bios...

Is it safe to update to most recent bios from a very old one? I am still on bios from around a year ago.

You have to follow your motherboards support instructions. You may have to install your bios update in steps.