AMD Ryzen 3000 Series CPUs With 7nm Zen 2 Architecture Can Support Up To A Max of 5000 MHz DDR4 Memory Speeds

Backendman May 11, 2019

AMD will be officially announcing their 3rd Generation Ryzen processors in a few weeks and it seems like there will be a major upgrade to the memory controller which would allow for faster memory support, theoretically.

AMD Ryzen 3000 CPUs Can Possibly Feature Support For Up To 5000 MHz DDR4 Memory Speeds

The information comes from the author of the DRAM Calculator for Ryzen processors 1usmus or Yuri Bubliy. He has mentioned on his Twitter feed that the maximum value of the frequency of the AMD Zen 2 generation of processors or Ryzen 3000 series is 5000 MHz and the UCLK is half of that so it should be set at 1250 MHz effective. The difference between the memory clock and UCLK is that the memory clock is specific only to the internal and external memory clock while the UMC clock is specific to the unified memory controller. Following is a set of clock domains for Zen based Ryzen CPUs (via WikiChip):

  • UClk – UMC Clock – The frequency at which the Unified Memory Controller’s (UMC) operates at. This frequency is identical to MemClk.
  • LClk – Link Clock – The clock at which the I/O Hub Controller communicates with the chip.
  • FClk – Fabric Clock – The clock at which the data fabric operates at. This frequency is identical to MemClk.
  • MemClk – Memory Clock – Internal and external memory clock.
  • CClk – Core Clock – The frequency at which the CPU core and the caches operate at (i.e. advertised frequency).

Now as a reference, the Ryzen  7 1700 had a core clock of 3000 MHz with 2400 MT/s memory and a UClk of 1200 MHz (600 MHz effective). Now the one thing to consider is that the Infinity Fabric clock is also tied to the memory clock and since Infinity Fabric cannot hit 5000 MHz, it will actually run at half the speed of the memory clock.

Now one thing to consider is while up to 5000 MHz is the maximum speed that can be achieved on the upcoming generation of Ryzen processors, not all CPUs may be able to hit those speeds. There are still some things to consider as currently, 2nd Generation Ryzen processors have a max speed of 4000 MHz listed but they can’t reach those speeds. Only overclockers might be able to hit the 5 GHz memory speed limits using LN2 but from a consumer perspective, these speeds may be far from reachable.

AMD Ryzen 3000 Series 5000 Mhz Memory Support

However, the X570 motherboards should allow for better memory clocks and support using Zen 2 processors compared to existing X470 and X370 products. The memory speeds supported by the new chips would indeed be better than what we got from the 1st and 2nd Gen Ryzen chips. That would definitely stir up some interest from the masses along with the added support for PCI-e Gen 4.0 which is something that the consumer market has been looking forward to for years now.

AMD CPU Roadmap (2018-2020)

Ryzen Family Ryzen 1000 Series Ryzen 2000 Series Ryzen 3000 Series Ryzen 4000 Series Ryzen 5000 Series
Architecture Zen (1) Zen (1) / Zen+ Zen (2) Zen (3) Zen (4)
Process Node 14nm 14nm / 12nm 7nm 7nm+ 5nm/6nm?
High End Server (SP3) EPYC 'Naples' EPYC 'Naples' EPYC 'Rome' EPYC 'Milan' EPYC 'Next-Gen'
Max Server Cores / Threads 32/64 32/64 64/128 TBD TBD
High End Desktop (TR4) Ryzen Threadripper 1000 Series Ryzen Threadripper 2000 Series Ryzen Threadripper 3000 Series (Castle Peak) Ryzen Threadripper 4000 Series Ryzen Threadripper 5000 Series
Max HEDT Cores / Threads 16/32 32/64 64/128? TBD TBD
Mainstream Desktop (AM4) Ryzen 1000 Series (Summit Ridge) Ryzen 2000 Series (Pinnacle Ridge) Ryzen 3000 Series (Matisse) Ryzen 4000 Series (Vermeer) Ryzen 5000 Series
Max Mainstream Cores / Threads 8/16 8/16 16/32 TBD TBD
Budget APU (AM4) N/A Ryzen 2000 Series (Raven Ridge) Ryzen 3000 Series (Picasso 14nm Zen+) Ryzen 4000 Series (Renior) Ryzen 5000 Series
Year 2017 2018 2019 2020 2021?

The Next-Gen X570 Chipset – A New House For Ryzen 3000 Series CPUs

As we saw with X470, there were a few features for the Ryzen 2000 series processors which were only supported by new motherboards such as Precision Boost Overdrive and XFR 2.0. There’s no doubt that AMD’s Zen 2 based Ryzen mainstream processor family would come with new features but the main highlight would be support for PCIe Gen4. The X570 platform will be an all PCIe Gen4 solution, which means this would most probably be the first consumer platform to feature support for the new PCIe standard.

A teaser shot of an upcoming ASRock X570 Phantom Gaming motherboard which is expected to be unveiled at Computex 19.

That, however, doesn’t mean that AMD Ryzen 3000 series would only be compatible on X570 boards since just like last time, the new CPUs will be backward compatible with X470 & X370 boards too.

They certainly won’t display the same feature set that will be available on the newly launched X570 lineup but will feature fully stable functionality for users who just want to drop in a new CPU and continue using their PCs without the hassle of upgrading the motherboard and everything from scratch. Expect more to hear at Computex 2019 which commences on 27th May 2019.

Which AMD Ryzen 3000 series processors are you most excited about?
  • AMD Ryzen 9 38** (Up To 16 Cores / 32 Threads) 32%, 8969 votes
    8969 votes 32%
    8969 votes - 32% of all votes
  • AMD Ryzen 7 37** (Up To 12 Cores / 24 Threads) 32%, 8932 votes
    8932 votes 32%
    8932 votes - 32% of all votes
  • AMD Ryzen 5 36** (Up To 8 Cores / 16 Threads) 29%, 8081 vote
    8081 vote 29%
    8081 vote - 29% of all votes
  • AMD Ryzen 3 33** (Up To 6 Cores / 12 Threads) 7%, 1834 votes
    1834 votes 7%
    1834 votes - 7% of all votes
Total Votes: 27816
March 3, 2019

The post AMD Ryzen 3000 Series CPUs With 7nm Zen 2 Architecture Can Support Up To A Max of 5000 MHz DDR4 Memory Speeds by Hassan Mujtaba appeared first on Wccftech.



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