Benjamin Carr, Ph.D. 👨🏻‍💻🧬Apr 13, 2025
#AMD's 3D #VCacheOptimizer Driver For Squeezing More Ryzen 9 #9950X3D Performance Review
Merged for the #Linux 6.13 kernel was the AMD 3D #VCache Optimizer driver for being able to influence the kernel's scheduling decisions on AMD processors where only a subset of CCDs have the larger 3D V-Cache.
Leveraging the AMD #3DVCache Optimizer Linux driver made for a very noticeable difference on the single-threaded workloads.
https://www.phoronix.com/review/amd-3d-vcache-optimizer-9950x3d
AMD's 3D V-Cache Optimizer Driver For Squeezing More Ryzen 9 9950X3D Performance Review

Merged for the Linux 6.13 kernel was the AMD 3D V-Cache Optimizer driver for being able to influence the kernel's scheduling decisions on AMD processors where only a subset of CCDs have the larger 3D V-Cache.

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Mar 12, 2025
#AMD #Ryzen 9 #9950X3D Delivers Excellent Performance For #Linux Developers, Creators & Technical Computing
Generationally 9950X3D came out 25% faster than 7950X3D overall making it still a very nice generational upgrade with being able to leverage the same #AM5 motherboard and DDR5 system memory.
Heavy hitting gains for 9950X3D in AI workloads like OpenVINO, TensorFlow, and Llama.cpp. HPC / technical computing workloads, and more all benefited handsomely from 3D #VCache.
https://www.phoronix.com/review/amd-ryzen-9-9950x3d-linux
AMD Ryzen 9 9950X3D Delivers Excellent Performance For Linux Developers, Creators & Technical Computing Review

Ahead of tomorrow's availability of the Ryzen 9 9900X3D and Ryzen 9 9950X3D CPUs in retail channels, today the embargo lifts on being able to deliver Ryzen 9 9950X3D reviews and performance benchmarks.

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 30, 2024
#Intel doesn't plan to bring 3D #VCache-like tech to consumer CPUs for now — next-gen #ClearwaterForest #Xeon #CPU will feature "#LocalCache" in the base tile akin to AMD's 3D V-Cache
"We still have it (3D Stacked Cache) technologically. This means that next year there will be a CPU (Clearwater Forest) for the first time that has a cache tile, but not on desktop."
https://www.tomshardware.com/pc-components/cpus/intel-doesnt-plan-to-bring-3d-v-cache-like-tech-to-consumer-cpus-for-now-next-gen-clearwater-forest-xeon-cpus-will-feature-local-cache-in-the-base-tile-akin-to-amds-3d-v-cache
Intel won't bring 3D V-Cache-like tech to consumer CPUs for now — next-gen Clearwater Forest Xeon CPUs will feature "Local Cache" in the base tile akin to AMD's 3D V-Cache

If only Intel would bring this to the mainstream market.

Tom's Hardware
Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 23, 2024
#AMD 3D #VCache Optimizer Driver Headlines The x86 Platform Enhancements In #Linux 6.13
This is the new driver from AMD that allows for users having AMD #Ryzen #X3D #CPU where only some #CCD(s) have the larger 3D V-Cache to set their preference on cache vs. frequency.
https://www.phoronix.com/news/Linux-6.13-x86-Platform-Drivers
AMD 3D V-Cache Optimizer Driver Headlines The x86 Platform Enhancements In Linux 6.13

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 21, 2024
#AMD crafts custom #EPYC #CPU with #HBM3 memory for #Microsoft #Azure – CPU with 88 #Zen4 cores and 450GB of HBM3 may be repurposed #MI300C, four chips hit 7TB/s
#HBv series of Azure #VM are focused on delivering high amounts of memory bandwidth; Microsoft calls it “biggest #HPC bottleneck.” Previously, Microsoft had used #MilanX and #GenoaX with AMD 3D #VCache to provide extra bandwidth, but for latest #HBv5 VMs, Microsoft clearly wanted something even more performant.
https://www.tomshardware.com/pc-components/cpus/amd-crafts-custom-epyc-cpu-for-microsoft-azure-with-hbm3-memory-cpu-with-88-zen-4-cores-and-450gb-of-hbm3-may-be-repurposed-mi300c-four-chips-hit-7-tb-s
AMD crafts custom EPYC CPU with HBM3 memory for Microsoft Azure – CPU with 96 Zen 4 cores and 450GB of HBM3 may be repurposed MI300C, four chips hit 7 TB/s [Updated]

This AMD chip with HBM3 is exclusive to Azure.

Tom's Hardware
Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 15, 2024
#AMD 3D #VCache Optimizer Driver To Be Merged For #LinuxKernel 6.13
The Ryzen X3D processors with 3D V-Cache for some core complex dies (CCDs) but not all can now have a bias set under #Linux whether it should be optimized for frequency mode or cache mode. When the 3D V-Cache optimizer driver is set to frequency mode, cores with the faster CCD are prioritized over the larger cache but lower clocked CCD.
https://www.phoronix.com/news/AMD-3DV-Optimizer-Linux-6.13
AMD 3D V-Cache Optimizer Driver To Be Merged For Linux 6.13

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 14, 2024
#Broadwell’s #eDRAM: VCache before #VCache was Cool
Broadwell’s limited #2013 desktop release is interesting because it came with 128 MB of eDRAM L4 cache. Broadwell couldn’t act as a high performance flagship, but #Intel took opportunity to go for high #iGPU performance. Even better, L4 could serve #CPU cores too. That meant Intel had a large cache on a desktop CPU, nearly 7 years before AMD launched the Ryzen 7 5800X3D with vertically stacked cache to give 96 MB of L3.
https://chipsandcheese.com/p/broadwells-edram-vcache-before-vcache
Broadwell’s eDRAM: VCache before VCache was Cool

Up to Haswell’s 2013 release, Intel’s “tick-tock” strategy seemed unstoppable.

Chips and Cheese
Benjamin Carr, Ph.D. 👨🏻‍💻🧬Nov 6, 2024
#AMD #Ryzen 7 #9800X3D #Linux Performance: #Zen5 With 3D #VCache
$480 Ryzen 7 9800X3D comes with 8c/16th and new version of 3D V-Cache tech that delivers impressive performance. Geo mean of over 300 benchmarks, 9800X3D surpassed Core i9 14900K and landed just behind prior gen Ryzen 9 7950X and 7950X3D #CPU. Compared to 7800X3D, 9800X3D delivered 1.34x performance. While not all workloads can benefit greatly from V-Cache, many productivity/HPC/technical workloads can.
https://www.phoronix.com/review/amd-ryzen-7-9800x3d-linux
AMD Ryzen 7 9800X3D Linux Performance: Zen 5 With 3D V-Cache Review

Ahead of tomorrow's availability of the AMD Ryzen 7 9800X3D processor as the first Zen 5 CPU released with 3D V-Cache, today the review embargo lifts.

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Oct 26, 2024
#AMD #X3D #VCache Performance Optimizer Driver Posted For #Linux
The AMD 3D V-Cache Performance Optimizer Driver provides an interface for user-space to indicate whether their workloads are more cache sensitive or prefer higher frequency operation. This interface sets a bias to alter the #CPU core reordering depending upon whether you are desiring higher frequences or larger L3 cache usage for your application(s).
https://www.phoronix.com/news/AMD-3DV-Cache-Optimizer-Linux
AMD 3D V-Cache Performance Optimizer Driver Posted For Linux

AMD today quietly posted a new open-source Linux kernel driver for review..

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Sep 10, 2024
#Zen5 Variants and More, Clock for Clock
They compare #Zen 5 variants along with a pile of older cores with clock speed taken out of the equation as much as possible. That means capping clock speeds on all CPUs to the lowest clocking chip. In this case, that’s the #3GHz Athlon II X2 651.
Desktop Zen 5 takes a healthy 20.8% lead over #Zen4 in the most comparable configuration. #VCache gives Zen 4 96 MB of L3 cache which shrinks Zen 5’s lead to a still significant 16.6%.
https://chipsandcheese.com/2024/08/20/zen-5-variants-and-more-clock-for-clock/
Zen 5 Variants and More, Clock for Clock

Zen 5 is AMD’s newest core architecture. Just a few weeks after launch, Zen 5 has already hit the market with several different cache, clock speed, and AVX-512 configurations. Here, I’m…

Chips and Cheese