Friday, September 27th 2024
AMD Ryzen 9 9950X3D and 9900X3D to Feature 3D V-cache on Both CCD Chiplets
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.
Source:
Benchlife.info
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.
131 Comments on AMD Ryzen 9 9950X3D and 9900X3D to Feature 3D V-cache on Both CCD Chiplets
I bought (rarely, with my own money) a 5800X3D and a 6800XT to replace the 5950X and 3090 I'd obtained from work for free. For someone who can basically get any hardware they want, no questions asked, the fact I technically downgraded to the 5800X3D and have voluntarily skipped free upgrades to both AM5 generation says more about just how completely OP the single-CCD X3D chips really are. Part of it is laziness; When I deal with hardware all day, the last thing I want to do in my free time is deal with more hardware. The 5800X3D has been with me over two years now. I don't think my PC has ever stuck with the same hardware for this long before, not even as a cash strapped student 25 years ago.
I'll likely replace it with the 9800X3D or a 9950X3D, depending on which one is the better fit for me, but if the 5800X3D is still trucking at 1440p120 then I'm honestly not sure I'm in a hurry to replace it.Nabbed a 5900X from work for the living room PC and it replaced a 5800X (because I wanted to give someone that 5800X).
Yes, it's measurably slower than the 5800X was in games, but I can't be arsed to actually measure the difference - I'm still getting hundreds of frames a second. Either the Windows scheduler is doing its job, or the inter-CCD latency just isn't a big enough performance hit to notice in the real world.
I would get the X3D due to lower TDP if it performs within a few % for productivity. I still think for msot of thew apps I'd use 265 will beat out 9900X/X3D and I care less about gaming, because I'm already happy enough with my 5800X and any of the Zen 5 or Arrow Lake cpu's will trash it in gaming.
The battle between Arrow Lake vs 9950X3D is gonna be interesting...
The 7900X3D is the worst of the worst - 6 standard cores plus 6 3D cores ensure the CPU never performs above what a Ryzen 5 7600 or a 7600X3D would, and you're going to be paying more than what a 7800X3D - a chip that will beat it at virtually everything by up to 30% for it. Good thing AMD learned and will be releasing dual X3D chips now... as they should have from the very start, so we didn't need to deal with the poor topology and software bugs that plague the 7900X3D and to a lesser extent, the 7950X3D.
Just look at what you are typing though none of what you say is from experience. Even AMD said that putting V cache on both CCDs made no difference. What you seem to forget is that the community demanded V cache on Dual CCD chips. Then they gave us a boon by giving us cores that run at 5.7 Ghz. You seriously have it so wrong about the chip that it is actually humourous. I am willing to bet that unless they have seriously refined the process that 9900X3D could indeed be slower than the 7900X3D in Games that do not support it like TWWH3. As I said before we will see if the community is smarter than AMD engineers. So going on your analysis how does Space Marine 2 use all 12 cores. What about City Skylines 2? Or whatever else I am playing that does not support V Cache. Then there are people using the argument of more cache being beneficial when the 7900X3D has just as much cache as the 7950X3D but more than the 7800X3D. So yes 8 cores with Vcache will perform better than 6 cores with Vcache but adding another 6 cores of 5.7 Ghz is not bad no matter how you try to colour it. Do you even realize how many transistors we are talking about? Unless you actually believe that Windows disables cores if it does not detect Vcache?
But to be fair, the source article put it in a very confusing way.
See this: x.com/gigadenza1/status/1840051325830045789
At the end of the day people are willing to pay big money for top of the line gear.
If doubling down on 3D cache provides a notable increase to performance or efficiency, I don't see why AMD shouldn't do it. It's a heck of a lot better than Intel's approach of pumping up the watts. Having multiple X3D caches was previously limited to the enterprise so I'm curious how much we'll be able to throw at this thing.
www.newegg.ca/d/Best-Sellers/GPUs-Video-Graphics-Cards/s/ID-48
But sometimes people say Canada does not matter
www.newegg.com/d/Best-Sellers/GPUs-Video-Graphics-Cards/s/ID-48?srsltid=AfmBOoqUn-Alg53gDRZGUDTexQvevaZfSm_6wSI9TD7n4U-nWLzHwhFp
Please tell me what page you get to when you see the 4090. Did you want me to use Amazon instead?
Makes it harder to not read processor related topic.I disagree. When you check linux (its only the kernel, not the userspace!, not the desktop!) there is a lot of code for the cores and where the threads are put. I want to point out to the source code for reference.
Heck, Intel having to come up with their hw scheduler because windows' scheduler is a shit, and AMD having tons of issues with that just serves to prove this point.
www.techpowerup.com/review/amd-ryzen-9-9700x-performance-smt-disabled/
The problem with 7950X3D is non-X3D CCD has the higher clockspeed against lower clocked X3D CCD which is against standard Window 11's thread scheduler behaviour.
9900X3D/9950X3D should have one higher clocked CCD with X3D and lower clocked CCD with or without X3D.