AMD Ryzen 9 9950X3D and 9900X3D to Feature 3D V-cache on Both CCD Chiplets

[btarunr]

Earlier this week, we got rumors that AMD is rushing in the Ryzen 7 9800X3D 8-core/16-thread "Zen 5" processor with 3D V-cache for a late-October debut. The 9800X3D succeeds the popular 7800X3D, and AMD probably hopes it will have a competitive gaming processor in time for Intel's Core Ultra 2-series "Arrow Lake-S" launch. In the previous article, it was reported that the higher core-count 9000X3D series processor models, the Ryzen 9 9950X3D and Ryzen 9 9900X3D, would arrive some time in Q1 2025, because it was reported that the chips have certain "new features" compared to their predecessors, the 7950X3D and 7900X3D. At the time, we even explored the possibility of AMD giving both 8-core CCDs on the processor 3D V-cache. Turns out, this is where things are headed.

A new report by Benchlife.info claims that the higher core-count 9950X3D and 9900X3D will implement 3D V-cache on both CCD chiplets, giving these processors an impressive 192 MB of L3 cache (96 MB per CCD), and 208 MB or 204 MB of "total cache" (L2+L3). The report also says that AMD is planning a Ryzen 5 9600X3D chip, its second attempt at taking on Intel's Core i5 lineup, following its very recent release of the Ryzen 5 7600X3D, which ended up 1-3% short of the Core i5-14600K in gaming workloads. There's no word on whether the 9600X3D will launch in October alongside the 9800X3D, or in Q1-2025 with the Ryzen 9 9000X3D series.


Documentation indicates that the max 3DVCache is still 64 MB, for a total of 96 MB L3 per CCD.


The introduction of 3D V-cache on both CCDs of the 9950X3D and 9900X3D could be interesting, as both chiplets will be capable of gaming workloads at a uniform performance level. On the 7950X3D and 7900X3D, OS scheduler-level QoS logic ensure gaming workloads are scheduled to the CCD with the 3D V-cache, while multithreaded productivity workloads are allowed to spread across both CCDs.

View at TechPowerUp Main Site | Source

 

[Crackong]

Finally, as it should've been.

 

[usiname]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

 

[Daven]

My work is assigning me CAD and rendering work. So I guess I’m upgrading my 7700x to a 9950x3d on my gaming rig. Thread assignment won’t be an issue if both CCDs have 3D cache.

Adobe Dimensions and Solid works needs some fast PC specs. I have a 7900xt so GPU spec is already there.

 

[Steevo]

Sounds like my next upgrade.

 

[napata]

I wonder how much it'll add to the price.

 

[Daven]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

I guess you’ve never heard of thread scheduling and how hit or miss it is. This solves that problem. Even better if clock speeds can also be higher.

 

[kondamin]

I wonder how much it'll add to the price.

Depends on how arrow lake performs.

 

[tfdsaf]

AMD needs to lower prices on the new 9000 series CPU's, period. They are just not value oriented enough and are way too expensive for what they bring to the table compared to AMD's own 7000 series and the Intel 13k series. Intel is offering 14 cores for as cheap as $300, while AMD are stuck with 6 cores at those prices, its absurd.

The 9600x is $280 for 6 cores and barely 3-4% improvement in gaming over the 7600x, around 9% improvement in multithreading, while Intel's 14600 offers 14 cores for $260. Its around 15% faster over the 9600x in multithreaded apps and offers similar gaming performance.

Thing is the 9600x should cost $230 at most, with the 7600x starting at $200 and the 7600 vanilla at $180. The 9700x trades blows with the 14600k in terms of gaming, but falls short in multithreading, while being $70 dollars more.

 

[Chaitanya]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

There are plenty tasks besides gaming that will take advantage of that victim cache. Also now that both dies are getting stacked cache, it should get rid of problem arising from assymetric cores.

AMD Ryzen 7 5800X3D On Linux: Not For Gaming, But Very Exciting For Other Workloads - Phoronix

www.phoronix.com

 

[john_]

AMD could call the dual CCD chips EPYC 9900X3D and EPYC 9950X3D and not be far from the truth. So much cache on those chips in the past was only available in server chips.

 

[persondb]

Did they get around the clock speed regressions from 3D cache? That was essentially why they haven`t done dual 3D cache,

A lot of applications suffered more from the clock speed regression than the benefits of more cache.

 

[Prima.Vera]

What happened to the 8xxx series? Why the jump from 7 to 9??

 

[dgianstefani]

What happened to the 8xxx series? Why the jump from 7 to 9??

laptop APUs

 

[_roman_]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

I disagree. This should improve a bit the problem of wrong threads on the wrong core.

Amd should market those processors as EPIC and make them drop in replacement cpus for existing Consumer mainboards with X670 and similar chipsets.

 

[Hardware1906]

What happened to the 8xxx series? Why the jump from 7 to 9??

8000 is for Desktop APU and Laptop

 

[phanbuey]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

I actually think with the inter-CCD latency at ~70ns this isn't far from the truth.

 

[Divide Overflow]

I look forward to TPU's review!

 

[kondamin]

I look forward to TPU's review!

Yes and wondering where the lunar lake review is at
for some reason THG focused on gaming, because that's really what everyone is going to be doing on an ultra mobile device.

 

[BlaezaLite]

I'll pick up a 9800X3D in a year and a half, when you've all bug tested it for me.

 

[john_]

because that's really what everyone is going to be doing on an ultra mobile device.

No, it just that everyone wonders what the next Intel GPU will be offering. No one really cares about the AI capabilities or the plus 5% performance from the CPU. Everyone wants to know if Battlemage will be a small jump or a huge jump for Intel. It will also be an indication if AMD will have a strong competition in x86 handheld consoles.

 

[AnotherReader]

Yes and wondering where the lunar lake review is at
for some reason THG focused on gaming, because that's really what everyone is going to be doing on an ultra mobile device.

Laptop reviews are, by definition, laptop reviews. Unlike desktops, where it's possible to standardize memory, power limits, and cooling, laptop CPUs are too dependent upon the OEM's configuration choices.

 

[damric]

This is a win.

As a plus side, these will be more energy efficient as they won't be clocked to the edge of silicon stability.

For those that don't need to cache, buy the regular 9950X.

 

[usiname]

I guess you’ve never heard of thread scheduling and how hit or miss it is. This solves that problem. Even better if clock speeds can also be higher.

I guess you have never heard for the fix for the scheduling issue? Yes extra cache on both CCDs will make it more easy for the users, but it won't make it faster than 9800X3D, the reason why so many people whining for extra cache on the second CCD. Anyway, the increased price(if) compared to Ryzen 7000 is not justified if this will just fix something, that already can be fixed - the scheduling issue

 

[AusWolf]

Finally, now the people will see that the 3D cache on both dies is useless and will stop crying for this

I disagree. This should improve a bit the problem of wrong threads on the wrong core.

Either scenario sounds plausible to me. It'll be interesting to see it in action.