4,000 MHz is the new 3,800MHz
Published: 16th October 2020 | Source: Technopat - Via WCCFTECH | Author: Mark Campbell
AMD's Ryzen 5000 processors have a higher memory "sweet spot", claims leaked slide
It looks like AMD's upcoming Zen 3 powered Ryzen 5000 series processors will feature a higher memory "sweet spot", with 4,000MHz DDR4 memory becoming the new 3,800MHz for users of AMD's latest Ryzen processors.
AMD's memory speeds are linked to Ryzen's Infinity Fabric Clock (fclk), memory controller clocks (uclk), a fact which makes faster DDR4 memory beneficial for AMD's Ryzen architectures for several reasons. In the slide below, which comes via WCCFTECH , AMD claims that 4,000 MHz is the new 3,800 MHz, a fact which means that Ryzen 5,000 series users should be able to use faster DDR5 memory while maintaining a 1:1:1 relationship between Infinity Fabric, Memory Controller and Memory frequencies.
AMD's Infinity Fabric Clock speed governs how fast AMD's CPU cores can communicate across CPU dies and with Ryzen's SOC controllers. This clock speed link allows faster memory speeds to enable faster, less latent inter-core communications for multi-die processors, such as the 12-core Ryzen 9 5900X and 16-core Ryzen 9 5950X, and more rapid communications with PCIe, SATA and USB devices.
While the silicon lottery will always apply when it comes to the capabilities of a specific processor's memory controller, AMD has designated 4,000MHz DDR4 memory as Ryzen's new sweet spot. This change means that Ryzen users who are looking for the fastest possible performance should be looking for low latency 4,000MHz DDR4 memory kits for their Ryzen 5000 series processors.
AMD's memory speeds are linked to Ryzen's Infinity Fabric Clock (fclk), memory controller clocks (uclk), a fact which makes faster DDR4 memory beneficial for AMD's Ryzen architectures for several reasons. In the slide below, which comes via WCCFTECH , AMD claims that 4,000 MHz is the new 3,800 MHz, a fact which means that Ryzen 5,000 series users should be able to use faster DDR5 memory while maintaining a 1:1:1 relationship between Infinity Fabric, Memory Controller and Memory frequencies.
AMD's Infinity Fabric Clock speed governs how fast AMD's CPU cores can communicate across CPU dies and with Ryzen's SOC controllers. This clock speed link allows faster memory speeds to enable faster, less latent inter-core communications for multi-die processors, such as the 12-core Ryzen 9 5900X and 16-core Ryzen 9 5950X, and more rapid communications with PCIe, SATA and USB devices.
While the silicon lottery will always apply when it comes to the capabilities of a specific processor's memory controller, AMD has designated 4,000MHz DDR4 memory as Ryzen's new sweet spot. This change means that Ryzen users who are looking for the fastest possible performance should be looking for low latency 4,000MHz DDR4 memory kits for their Ryzen 5000 series processors.
With Zen 3's radical core redesigns, the impact of memory speed will likely be lessened with Ryzen 5000 series processors when compared to prior Ryzen CPU generation. Even so, faster, less latent memory will undoubtedly result in notable performance increased in some applications, especially those which are bandwidth-heavy or latency-sensitive.
You can join the discussion on AMD's Ryzen 5000 series memory "sweet spot" on the OC3D Forums .
Most Recent Comments
16-10-2020, 08:26:47
robbiecThis is interesting news as the I/O die was seemingly unchanged if you read by the official presentation and that handles the Infinity Fabric? So its speculated that the upper tier is now 2000Mhz instead of 1800Mhz for Fclk and 4000 for Mclk - all helps I suppose. Samsung B-Dies go to 4000? Quote
16-10-2020, 08:42:46
AlienALXThis is misleading. Getting 3800mhz was if you were the golden boy. I couldn't even get my RAM to 3700, and most can't either and that was on a 3950x.
Which is probably why it has "good luck" written at the bottom. Yeah, you'll friggin need it ffs. Quote
Which is probably why it has "good luck" written at the bottom. Yeah, you'll friggin need it ffs. Quote
16-10-2020, 11:03:45
robbiecYeah, 1800 for IF and 3600 for Dram is the sweetspot for Zen2, an extra 200Mhz for IF might seem plausible if they refreshed the 3rd chiplet. Dunno, my 8Pack b-dies should do 4000/C19, might be putting 1.5V through them though 😜 Quote
16-10-2020, 17:29:11
AngryGoldfishDoes low latency 3200Mhz still offer comparable performance with 3600 or 3800Mhz higher latency memory on Zen 2? Quote
16-10-2020, 19:01:00
AlienALXQuote:
Originally Posted by AngryGoldfish  Does low latency 3200Mhz still offer comparable performance with 3600 or 3800Mhz higher latency memory on Zen 2? |