![]() ![]() It is werid because it passes ram stablity testing and has never crashed/glitched whilst being benchmarked and tested, but it just doesn't return the results. Yeah, my best guess here is that Fclck 2000Mhz isn't quite stable because the performance hit is marked even with tight timings, where we'd expect to see near linear performance increase like Zen 2 did until 1:1 IF breakdown. Maybe It doesn't crash but that doesn't mean it's a stable oc Lots of more skilled memory overclockers than me are working on pushing things to their limits. Thats also why I'm not using a really expensive motherboard - to keep things in the realm of realistic kit for general use, not enthusiast/power users. That wasn't really what I was striving for here, what I wanted to do was find out what 'off the shelf' ramkits are going to be best for people who want a 'fit, click and forget' RAM kit for Zen 3. I can't confirm the exact reasons at this time, It's going to take a long time to really get to the bottom of optimal RAM/settings for performance on Zen 3. I did much more extensive testing with Zen 2 and the gains for very fast ram and tight timings, and circumstances in which you actually enjoy them are just tiny and rare. ![]() ![]() I'm still confident that 99% of users can pick up a good 3600Mhz kit and enjoy 99.5% of the performance. I'm always eager to hear suggestions re methodologies and ways to improve my articles, but please take this article in the context it was intended: An exploration to find the best options for off the shelf RAM for Zen 3, NOT as an exploration of the absolute limits of Zen 3. I'm still working on it, it takes a lot of time and I have a bunch of other things to get on with testing. DDR4-3600 remains the 'sweet spot' and AMDs recommendation for the Zen 3-based processors, which are also specified with up to DDR4-3200. Sure, some of that could be down to latency, but I can get to 4000Mhz CL15 and still not obtain gains. What is weird is despite clear almost linear scaling with Fclck on Zen 2, it appears to peter out at very high Fclcks on Zen 3. Likewise, you can probably tighten timings and reduce latency to obtain additional performance 3733-3933Mhz 1:1 Fclck, but there really aren't many RAM kits out there with A-XMP profiles that will get you the results without putting in the work. My CPU appears to be stable with Fclck at 2000Mhz BUT performance takes a hit, and I can only assume that there's marginal stabliity at that speed so it's detrimental to performance. What I was trying to do here was find out where the sweet spot for 'commonly available' ram speeds/timings so that people can buy a kit with decent timings and be assured of nice plug and play results, without messing around forever with ram timings/settings themselves. I only ahve one CPU, I don't think it's fair to make assumptions about ultimate performance with a sample of N=1. It's of limited utiliity except for hard core overclockers who will find their own path anyway. Loads of other people are better at memory overclocking than me The purpose of this testing wasn't really to find the 'ultimate' limits of the Zen3 platform, for a number of reasons: NOTE: I posted this same link to another User with a similar question abut RAM Speed for the 5000 series CPUs.Fclck was set manually to 1:1 in all cases, my 5800X Fclck is stable to 2000Mhz (but performance gets weird). Yes I found this Tom's Hardware that mentions that the 5000 Series CPU is 3600Mhz the same as the 3000 Series CPUs: ![]() Nonetheless, Hallock said that in some scenarios, when surpassing a 2,000 MHz FCLK could yield better performance In contrast, Zen 3's sweet spot was at DDR4-3600 (1,800 MHz FCLK), with DDR4-4000 (2,000 MHz FCLK) being the golden standard. Hallock believes that DDR5-6000 will be the sweet spot for Zen 4 based on cost, stability, performance, availability, and ease. The Zen 4 parts have a default FCLK of 1,733 MHz, supporting DDR5-5200 memory by default. Maybe for the newest 7000 Series CPUs that might be true since they use DDR5 RAM instead of DDR4 RAM.įrom Tom's Hardware about the 7000 Series Sweet Spot: įrom the linked article above. ![]()
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