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.
126 Comments on AMD Ryzen 9 9950X3D and 9900X3D to Feature 3D V-cache on Both CCD Chiplets
For most other stuff it barely made a difference (like it only being 2% better for games), while most other stuff actually regressed. On average it ended up regressing.
And another thing, if you only care about single threaded stuff, would you even go for a 9950x3D to begin with?
Basically AMD is fixing the current flaw of 7950X3D where sometimes the performance are just too erratic and that is unbecoming for an ultra high end product
YTbers like HUB and Der8auer said just recently that the 7950X3D sometimes just give lower FPS than it did before for some reason, HUB said after using it for 6 months Windows just give lower FPS. These guys know their 7950X3D are not up to snuff because they test hardware all the time, for average users that is not possible.
Heck, even their all e-cores xeon looks amazing and provides awesome value.
Now, if all you care is about gaming, then yeah, it's pretty useless.Why would it be faster than a 9800x3D?Not that awesome after you disable SMT. Unless you're ok with toggling back on everytime, then I guess it's fair.
I don't exactly know how the thread scheduler judges if a task is too heavy or not though, but recent Lunar lake benchmarks seems to suggest that it's working pretty well
CoveLake is 4C4T+4c4t, and kicked everything else off the core ringbus so that only the P-cores stayed. It would be close to Tiger Lake, minus the hyperthreading and plus the architectural improvements.Including the E-cores in a lot of workloads with such bus architecture would probably slow things down even further, if it ends up causing problems in the P-cores' cache hierarchy.
I have both and haven't found a single game where it doesn't match the 7800x3d but I only play a handful of games.
:roll: :roll::roll::roll::roll:It overloads preferred cores, I down clocked my 2 fastest cores last week to solve the scheduling mess that is Windows. Simply couldnt find a solution in all of the hidden scheduler tunables. A circa 2% faster clock speed Windows is like ok I am going to put all the threads on this baby.