I know there is a lot to add to this, if you want to dive into details.Īs a result of all that (I am also learning), especially the BIOS issues and RAM timing difficulties, I am sending back the old and replacing my bad VRM Motherboard and Single-Rank RAM: I just didn't want to go too much into detail, as that just confuses most people. Please write if you want to add/remove/correct anything. Do not confuse with Dual-Channel, that's something else. This is the background of what triggered Gamers Nexus' up to 10% performance increase video on RAM. T-Topology likes four Single-Ranked RAM, for example 4x8GB sticks. To boil things down: Daisy Chain prefers two Dual-Ranked RAM, for example 2x16GB sticks. Not all X570 boards prefer Daisy-Chain, but most do. Check the list and scroll to the right to see Memory-Memory Topology. Zen3 in conjunction with high clocking memory are sensitive to the memory topology of Motherboards. I aim for that for VR and overclocking, but it's not necessary for everyone. It'll help you achieve stable and smooth performance. Check the list for true VRM Phases, range and smart power stages. Zen3 5800/5900 are sensitive to Motherboards with low quality VRMs. Some have reported abnormal timings (all over the place) when using XMP. Afterwards, make sure to check RAM timings. To smoothen out frametimes, to eliminate microstutters, you'd want to couple them. For example: 1900MHz (IF) = 1900MHz (MC) = 3800MHz RAM clock. These express themselves in comparatively strong 1% amplitudes in the CPU frametime graph, as well as stronger deviating 1% and 0.1% framerates logged. If you don't match Infinity Fabric (IF) = Memory Controller (MC) and then add RAM which fits to that, you will have unstable frametimes. The fire in the Chinese MSI facility was just at a production line, no laboratories were there. More BIOS patches are getting worked on and will fix it. 5900/5950 usually manage 2000MHz Infinity Fabric. But: Many X570 Boards have problems with such high RAM timings. If yours goes to 2000MHz, then that's a very good chip, open Champagne. Now that more and more benchmarks and voices come out, there are a few things others found, which we can sum up already:
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