So as the title says, what can you expect? Well in an attempt to help out present and future Ryzen users I decided to gather what DDR4 memory I have here and test for daily stability without going too in depth (only changing voltage and primary timings). My test system will be made up of: CPU: Ryzen 7 2700X CPU Cooler: Noctua NH-U9S Motherboard: X470 AORUS Gaming 7 WiFi (F4 BIOS, AGESA 184.108.40.206) Memory: Varied Graphics Card: RX 480 PSU: Corsair HX1200i OS: Windows 10 64 bit The CPU was locked at a static 4.0Ghz for consistency, for the majority of my testing the SOC voltage was running at 1.1v set in BIOS which is closer to 1.08-1.09v real but some kits appeared to prefer a higher SOC voltage once manually tuned. As a personal rule of thumb I consider 1.4v Dram to be safe for daily operation on DDR4 but of course not all memory ICs react the same way to voltage and degradation so for testing purposes I'm ok with pushing the boundary a little but I don't recommend over 1.4v Dram for a daily setup. For testing the memory I'm using the Karhu Software RAM Test, I've found this to be an excellent program in testing for instability related to memory and it appears to detect instabilities fairly quickly compared to others I've used in the past but of course with any stability testing your mileage may vary. The text below is taken from Karhu Softwares FAQ section in regards to how long the stress test should be run for and coverage rate vs error detection. I've also included AIDA64 results in addition to the stress test for an indication of performance gain or loss while using various kits at different speeds/timings as well. So with most of that out of the way these are the memory kits that I've tested: 2x8GB Team Group Dark Pro 3466 c16 (Single Sided Samsung B Die ICs) 2x8GB Team Group Nighthawk RGB 3200 c16 (Single Sided Samsung B Die ICs) 2x8GB Corsair Vengeance LED 3200 c16 v4.24 (Dual Sided Samsung E Die ICs) 2x8GB Team Group T-Force Dark 3000 c16 (Single Sided Hynix AFR ICs) 2x4GB Zadak511 Shield 3000 c16 (Single Sided Hynix MFR ICs) 4x8GB Team Group Nighthawk RGB 3200 c16 (Single Sided Samsung B Die ICs) And that is the sum total of all the DDR4 memory that I happen to have on hand, While it's not alot in the grand scheme I do hope that this will at least help someone Onto the testing! So we'll start off with the 3466 c16 Dark Pro kit from Team Group but at JEDEC speed and timings 2400Mhz 16-16-16-39-55 with 1.2v Dram and 1.09v SOC, No stability test here as I feel as though it's not needed. Spoiler: Spoiler Next was trying XMP which in this case is 3466Mhz 16-18-18-38-56 at 1.35v Dram This one I tested for an hour coverage which I'm happy to say performed flawlessly. Spoiler: Spoiler I decided I'd try and push my luck and for for 3600Mhz at the same XMP timings and voltage Sadly this one did fail but I will attempt to revisit it before too long. Spoiler: Spoiler Onto the next kit! Some more Samsung B Die but this time with an RGB flavour in the form of Team Groups Nighthawk RGB The XMP for this kit is 3200Mhz 16-18-18-38-56 with 1.35v Dram and as expected was stable for me with those settings. Spoiler: Spoiler Next was to bump up the speed and voltage (1.4v Dram) while lowering the timings a little. 3466Mhz 16-16-16-36-48 with ProcODT set to 60 ohms. Spoiler: Spoiler Instead of pushing for higher speed I then decided to lower the speed and try and tighten the primary timings So I ended up with 3200Mhz 14-14-14-34-48 with 1.4v Dram and ProcODT again set to 60 ohms. Spoiler: Spoiler As a final test with this configuration I stuck with the same speed as before but again lowered the timings a little but this required a touch more Dram voltage to be stable so now we have 3200Mhz 14-14-14-28-36 with 1.42v Dram and again ProcODT set to 60 ohms. Spoiler: Spoiler Next up is my only Dual Sided memory kit, Now this kit of Corsair Vengeance LED predates Ryzen and it being Dual Sided I was not expecting great results from it but we'll see what happens. First up is the JEDEC spec which here is 2133Mhz 15-15-15-36-51 at 1.2v Dram No stability test as again I don't believe it to be needed Spoiler: Spoiler This is the only kit I tested that failed to run stable at its XMP which doesn't surprise me but that doesn't mean we can't work with it a little, While not stable at the XMP speed of 3200 it was in fact stable at 3133Mhz with 1.4v Dram and the XMP timings. Spoiler: Spoiler To get that small bump up to 3200Mhz this kit needed 1.45v Dram to become stable which is above what I'd recommend for daily settings. Spoiler: Spoiler Obviously we couldn't really be going up in speed or down in timings next was to drop the memory speed and timings to see if more could be gained there so at 1.38v Dram it managed 3000Mhz 16-18-18-36-54 Spoiler: Spoiler And onto another kit! Next is some Single Sided Hynix AFR which here is in Team Groups T-Force Dark 3000 kit. So we'll start of at the XMP of 3000Mhz 16-18-18-38-56 which is nice and stable Spoiler: Spoiler Next we'll bump up the speed to 3200Mhz, change dram voltage to 1.4v, and keep the timings where they are. Spoiler: Spoiler Since 3200 ran so smoothly I decided to push a little higher and go for 3266Mhz 16-18-18-40-60 with 1.41v Dram and 1.15v SOC and which did fail but it made it over half way through the test as where most failure occurred within the first 5-10 minutes. Spoiler: Spoiler And finally onto the last memory type I own, Hynix MFR which here is in a couple of Zadak511 Shield RGB sticks. Starting off with the XMP of 3000Mhz 16-18-18-38-57 which was stable Spoiler: Spoiler Next was to up the voltage a little to 1.4v Dram and lower the timings down so we ended up with 3000Mhz 16-16-16-34-50 Spoiler: Spoiler But that passed pretty easy so bumping the dram voltage a tiny amount again to 1.41v and SOC to 1.1v resulted in a pretty respectable 3000Mhz 14-16-16-28-48 Spoiler: Spoiler And that was where I stopped for 3000Mhz, for 3200Mhz I stepped the voltages back down to 1.35v Dram and 1.1v SOC so we ended up with 3200Mhz 16-18-18-38-57 stable Spoiler: Spoiler Moving on from there I lowered a couple of timings and reran which resulted in 3200Mhz 16-16-16-38-57 stable Spoiler: Spoiler and finally bumping up the dram voltage to 1.42v and the SOC to 1.125v resulted in 3200Mhz 14-16-16-34-50 stable, pretty good result imo Spoiler: Spoiler ] And finally the 4x8GB NightHawk RGB results (4 x Single Sided B Die), Since this is more memory I needed to do a longer stress test which is part of the reason why these took longer. Starting off with the XMP of 3200 16-18-18-38-56 at 1.35v Dram, all nice and stable Spoiler: Spoiler From there I bumped Dram voltage to 1.4v, SOC to 1.125v and went for 3200 14-14-14-34-51 which was stable Spoiler: Spoiler From there I went up in speed and timings but leaving Dram voltage at 1.4v, SOC was dropped back to 1.1v, and we got 3466Mhz 16-18-18-38-56 Stable Spoiler: Spoiler And finally, 3600Mhz on 4x8GB DIMMs, this one took a while to test and I probably spent the better part of a day just on this configuration alone, I'm including it so others could try it if they wanted but I never could get it stable enough for me, my best result I manually stopped at 20mins. 3600Mhz 16-18-18-38-56 with 1.45v Dram, 1.09v SOC and 48ohm ProcODT Spoiler: Spoiler And onto Threadripper! System specs for this one are: CPU: Ryzen Threadripper 1900X/2920X CPU Cooler: Noctua NH-U14S TR4 Motherboard: X399 AORUS Gaming 7 (F11e BIOS, AGESA 220.127.116.11) Memory: 4x8GB TeamGroup Nighthawk RGB 3200Mhz c16 Graphics Card: RX 480 PSU: Corsair HX1200i OS: Windows 10 64 bit So with this I tested both 1st Gen and 2nd Gen Threadripper seeing as I was only using one memory kit. Both CPUs were again set to 4.0Ghz in an effort to try and keep everything as consistent as possible, all testing was done with the memory in Distributed mode (Set in BIOS) as that's the default config. RTC doesn't read SOC voltage or ProcODT for me here so unless I say otherwise it's set to 1.1v and 53.3 respectively First up let's start with the 1900X! Straight out of the box default 2133Mhz Spoiler: Spoiler Then of course onto XMP (3200Mhz 16-18-18-38-56) which as expected was stable Spoiler: Spoiler Next was to drop the timings so here is 3200Mhz 14-14-14-36-75 at 1.38v Dram and 1.15v SOC Spoiler: Spoiler From there I took the leap straight to 3600Mhz 16-18-18-38-84 with 1.4v Dram, 60ohm ProcODT and 1.125v SOC Spoiler: Spoiler There wasn't anything I could gain from this point so I moved onto the 2920X, at the request of glnn_23 I've added some NUMA results alongside the UMA ones, these are using a different OS as the initial one I was using for the tests had been corrupted after more than a few blue screens and generally being unstable but they are using the same settings as their UMA counterparts. As before we start off with 2133Mhz at default to get a baseline Spoiler: Distributed Mode (UMA) No NUMA result for 2133Mhz And then move onto the XMP of 3200Mhz 16-18-18-38-56 which was stable Spoiler: Distributed Mode (UMA) Spoiler: Local Mode (NUMA) After that I tightened up the timings a little to get 3200Mhz 14-14-14-34-48 with 1.36v Dram, 1.1v SOC and 48ohm ProcODT Spoiler: Distributed Mode (UMA) Spoiler: Local Mode (NUMA) From there I reset XMP but changed the speed to 3466Mhz and set Dram to 1.4v with ProcODT at 53.3ohms Spoiler: Distributed Mode (UMA) Spoiler: Local Mode (NUMA) And finally 3600Mhz, this one was a bit of a pain and I suspect my OS had started to give up at this point but while it passed the 1 hour stability test (it got a single error just after the hour mark) it took voltages I'm not personally comfortable with on a daily system. 3600Mhz 16-18-18-38-56 with 1.45v Dram, 1.1v SOC and 60ohm ProODT Spoiler: Distributed Mode (UMA) Spoiler: Local Mode (NUMA) Either way I hope this helps someone out and if there's anything you'd like to know please ask and I'll do my best to answer it That's all folks!