Both of these titles demonstrated the benefits of faster RAM on Zen2 and again showed the negative impact once the 1:1 infinity fabric to memory clock ratio was broken. Moving onto key gaming benchmarks, we looked at Rainbow 6 Siege and Shadow of the Tomb Raider. We donвЂ™t know the reason for this given that all things being equal these tighter timings should increase performance, or at the very least not harm it. Tightening timings to CL16 sees performance slacken to just under 12000 points: A very interesting results given what we thought we knew about infinity fabrics speed and its relationship to CPU performance. However, increasing speeds into the realms of 38MHz sees little if any improvement in performance with 4000MHz CL18 close but slightly behind 3600MHz and 3800MHz. In Zen 2 we saw a strong positive trend with RAM speed from 2133MHz to 3733MHz, and we observe the same here on Zen 3: Slower RAM is a serious detriment to performance, with 3600MHz yielding much higher results. ItвЂ™s those scores weвЂ™re concentrating on here. TImespy is a Dx12 based benchmark with a portion dedicated to CPU performance in isolation. Cinebench R20 appears almost oblivious to the RAM speed of the System with even 2133MHz not causing a significant performance deficit. Note that the scale starts at 5000 Points: The difference between these results is small enough not to cause concern, and itвЂ™s not possible to consider this a вЂtrendвЂ™ in performance owing to the marginally lower scores at higher speeds. Honing in on the benchmarks that matter we again showed that Cinebench is not a reliable indicator of performance linked to RAM: Our scores varied little with RAM speed. Zen 3 RAM Synthetic Test results: CineBench R20 and Timespy From there we established representative RAM profiles across a spectrum of speeds to emulate widely available RAM kits. We were able to tighten timings down to CL 16-16-16-34 at 4000MHz. Using our Patriot Viper 4400Mhz memory kit, which comprises Samsung B-Die Ram with CL19 timings, we were quickly able to establish that our Ryzen 5800X was stable at 4000MHz with Infinity Fabric (Fclck) at 2000MHz. Overclocking on the Zen 3 platform proved relatively straight forward. Finally, can we use this information to make any recommendations about the best RAM for your Zen 3 system?.Secondly, does Zen 3 performance scale with RAM speed in the same way weвЂ™ve become accustomed to?.Firstly, does Zen 3 improve our ability to lift Infinity Fabric speeds to match faster RAM?.

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