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AMD Ryzen 7000 Shown with DDR5-6400 Memory Speed

btarunr

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An alleged AMD Ryzen 7000 pre-release sample was shown running DDR5-6400 memory speed, which is already a 23 percent memory overclock on top of the DDR5-5200 native memory clock speed support. We've known since April that the Ryzen 7000 "Zen 4" processors are being designed with a focus on good memory overclocking headroom, and this is the first instance of an enthusiast-class memory speed on this platform. The feat was pulled off by Toppc, a professional overclocker affiliated with MSI.

The most interesting aspect of this feat is the density. The machine is shown featuring 64 GB of memory—something currently only doable with 32 GB quad-rank (double-sided) DIMMs; or by populating all four slots on the motherboard with 16 GB dual-rank (single-sided) DIMMs, or a 2DPC setup, which would make this feat all the more impressive. The CPU-Z screenshot by Toppc reveals a DRAM clock of 3202 MHz (DDR5-6404), and timings of 32-38-38-96. The Socket AM5 Ryzen 7000 desktop processors only support DDR5 memory type (no backwards-compatibility with DDR4), and AMD states that since it is betting solely on DDR5 (with no DDR4 sidewheels), enthusiasts can expect a good memory overclocking experience.



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I like the decision to leave DDR4 behind. Wish Intel would've done the same. I really wanted to upgrade but will wait until Intel is off DDR4.
 
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Yes it's 32-33-33-96
 
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Why is this news? Didn't AMD show Zen4 benchmarks with 6400 RAM a month ago?
 
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I like the decision to leave DDR4 behind. Wish Intel would've done the same. I really wanted to upgrade but will wait until Intel is off DDR4.
Availability of DDR5 was quite bad at beginning(as is the case with every new Generation of RAM) so it made sense to have support of both outgoing and incoming memory formats. Given AMD is releasing DDR5 based platform nearly a year later and with supplies of RAM improved it makes sense to support single format exclusively.
 
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It will be interesting to know if B650 boards are going to support such (or better) frequency and latency at launch.
 

Alan Smithee

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This is rather meaningless because we don't know what the Infinity Fabric speed is on Ryzen 7000.

On Zen 3 you could overclock RAM like crazy but best performance was at 3600/3800 due to Infinity Fabric maxing out at 1800-1900 MHz on almost all chips, very rarely 2000.

Since this was done by a pro overclocker, I'm going to assume that an overclock to DDR5-6400 on Zen 4 is equivalent to at least DDR4-4000 (1:1) on Zen 3 in terms of rarity and stability.
 
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IF is 1600mhz ? on Zen3 , IF can't go higher than 1900mhz.
 
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This is rather meaningless because we don't know what the Infinity Fabric speed is on Ryzen 7000.

On Zen 3 you could overclock RAM like crazy but best performance was at 3600/3800 due to Infinity Fabric maxing out at 1800-1900 MHz on almost all chips, very rarely 2000.

Since this was done by a pro overclocker, I'm going to assume that an overclock to DDR5-6400 on Zen 4 is equivalent to at least DDR4-4000 (1:1) on Zen 3 in terms of rarity and stability.

I'm running 1:1 2000Mhz stable...
Just turned xmp on and was good to go...
Timings might not be the most impressive, but haven't bothered trying to oc any further...
 
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I like the decision to leave DDR4 behind. Wish Intel would've done the same. I really wanted to upgrade but will wait until Intel is off DDR4.
Unlike AMD, Intel didn't want to price out the less fortunate.
 
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I don't know if ill upgrade from my 5900x, it is still going strong and plays all my games just fine.. This would have to be a lot better.
 
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Explains the locked K model chips. It's help the less fortunate.
Agreed those cpu's can be beastly.



 
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I wonder how many of those less fortunate don't realize they are paying the difference in their electricity bill.
What difference would that be.

 
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What difference would that be.


If the >+25% efficiency gain for Zen 4 is true.
 
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