AMD Ryzen 7000 DDR5 memory ‘sweet spot’ is 6000 MT/s, Infinity Fabric frequency up to 3 GHz

Published: Aug 10th 2022, 11:30 GMT   Comments

AMD Ryzen 7000 with memory improvements

Some interesting details on next-gen AMD desktop platform have just been confirmed. 

The DDR5 memory optimizations for desktop Ryzen 7000 series codenamed “Raphael” have been revealed by a leaked Gigabyte BIOS for X670E motherboards, supposedly based on AGESA Some enthusiasts, including the creator of HYDRA/CTR tuning tools for Ryzen CPUs, were quick to analyze the data hidden in the firmware. This data confirmed the following.

Although this wasn’t part of the Ryzen 7000 reveal earlier this month, the BIOS confirms AMD EXPO technology (EXtended Profiles for Overclocking). Which is AMD’s alternative to Intel XMP 3.0 for DDR5 memory. We mentioned that AMD is working on such technology in April this year. The new leak also confirms that EXPO will support two main profiles either focusing on bandwidth or low latency.

Users will be allowed to modify active memory timings for each of the four DDR5 channels, but the most interesting details is the maximum frequency of Infinity Fabric, reportedly up to 3000 MHz. However, do note that this is just the option in the BIOS, not necessarily an achievable frequency.

The X670E motherboard from Gigabyte is to offer the following memory timing options:

Dram ODT impedance RTT_NOM_WR
Dram ODT impedance RTT_NOM_RD
Dram ODT impedance RTT_WR
Dram ODT impedance RTT_PARK
Dram ODT impedance DQS_RTT_PARK
Processor ODT impedance
Processor DQ drive strengths
Dram DQ drive strengths
Processor CK drive strengths
Processor CA drive strengths
Processor CS drive strengths
DDR RAS (tab)
DDR Training Options (tab)
DDR Data Eye (tab)

— AORUS X670E memory tuning options

Furthermore, there is also a rumor from Wccftech who claim to have received information on the DDR5 memory ‘sweet spot’ for AMD Ryzen 7000 CPUs. It is alleged that DDR5-6000 should offer the best performance, supposedly in 1:1 ratio with Infinity Fabric frequency. Any faster memory module will likely require this ratio to be changed to 1:2, but a claim is made that such setting will provide poor results, and it is simply not recommended for gaming.

AMD Ryzen 3000 “Zen 2” Sweet Spot – DDR4-3800
AMD Ryzen 5000 “Zen 3” Sweet Spot – DDR4-4000
AMD Ryzen 7000 “Zen 4” Sweet Spot – DDR5-6000

— Wccftech on Ryzen 7000 Memory

AMD Ryzen 7000 series are now set to launch on September 15th. It is expected that high-speed memory modules should also become popular in the next few weeks, just as AMD and Intel fully deploy their new platforms.

AMD Mainstream Desktop CPU Series
VideoCardz.comRyzen 3000Ryzen 5000Ryzen 7000
Core µArch7nm Zen2 Matisse7nm Zen3 Vermeer5nm Zen4 Raphael
Launch DateJuly 2019November 2020September 2022
Graphics2CUs RDNA2
Max Core Count161616
Memory SupportDDR4-3200DDR4-3200DDR5-5600
OC Mem. Sweet SpotDDR4-3800DDR4-4000DDR5-6000
Max TDP105W105W170W
Max PTT142W142W230W
PCIe GenPCIe Gen4PCIe Gen4PCIe Gen5
Chipset SeriesAMD 400AMD 500AMD 600

Source: Wccftech, Yuri Bubliy

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