AMD recently released its flagship AMD Zen 3D processor, the Ryzen 7 5800X3D, and with it, there was a lot of excitement about the new 3D V-cache technology that the CPU is based on.
The Ryzen 7 5800X3D outperformed the Ryzen 9 5950X and the i9-12900K in real-world benchmarks, despite having fewer cores and being taxed by a slower base and higher clock speed.
Read now:AM5: everything we know.
However, the Zen 3D series doesn’t stop at the 5800X3D, as there are reports that AMD may be adding something to the Zen 3D collection.
What is Zen3D?
Zen 3D is a kind of “rehash” aimed at adding 3D V cache to the existing Zen 3 architecture. We’ll get to 3D V-cache later, but integrating the new caching technology into AMD’s pre-existing architecture is no easy task.
The 3D V cache needs some provisioning first, as the cache is unstable and serves cores at higher frequencies. The reason we think this is is because AMD ditched the overclocking support for the 5800X3D for no reason why.
This isn’t the first time AMD has re-released/re-hashed a CPU architecture. AMD re-released its first Zen architecture under the name Zen+ (plus), added some much-needed performance improvements, and fixed a few bugs that plagued Zen at the time. Perhaps that’s also AMD’s focus this time around, troubleshooting the 5000 series.
What is 3D V Cache?
We’re going to talk about the 3D V cache as we know it in the 5800X3D, as AMD may have made some changes to the 3D V cache technology that integrates into the rest of the Zen 3D architecture.
The 3D cache is not stacked sideways but vertically, hence the term 3D cache. This dramatically increases the number of chiplets you can fit into a given size area, resulting in greater cache capacities without sacrificing cache access speeds. Vertical stacking allows AMD to achieve the massive 96MB L3 cache with a total access speed of 2TB/s in its 5800X3D CPUs. The enormous capacity is achieved by superimposing two layers of 48 MB cache.
This is all made possible thanks to AMD’s close relationship with its chiplet manufacturer TSMC. This relationship allowed them to create a CPU using a new 3D packaging technique.
This allows the CPU cache to be stacked on top of the 5800X3D’s Core Complex Die (CCD), while using a hybrid bonding approach that combines copper-to-copper bonding with through-silicon vias (TSVs), making the Zen 3 not just CPU- cores and L3 cache to seamlessly communicate and exchange data, but the CPU profile remains slim. This keeps the CPU compatible with the AM4 socket and existing AM4 coolers.
Zen 3D release date
The supposed Zen 3D “rehash” was supposed to come out sometime before Zen 4 and AM5. This means we can look at an August release.
Zen 3D Rumor
Trustworthy Twitter Leaker Greymon55Proven to be often right, has indicated that “several” new AMD Zen 3 processors will hit the shelves at some point before Zen 4 CPUs.
We should hear more about this new mysterious CPU lineup next month. So far, we’ve only seen the eight-core, 16-thread Ryzen 7 5800X3D with the 3D v-cache technology. Will AMD actually expand Zen 3D and release new CPUs this close to launching a new generation? And if so, why?
Why extend the life of AM4 just before the release of AM5?
AM5, like any other new integration, is likely to have some teething problems, in fact we are sure it will. But there are more than a few reasons why we think AMD did this.
AMD probably wants to further test its 3D V-cache technology on a platform it’s already optimized and well-acquainted with. Zen 3 isn’t just a platform AMD is familiar with, it’s a platform AMD knows its users are familiar with. This means that we will begin to better understand some of the changes to the platform and the implications of those changes.
We’re sure AMD will release 3D V-cache integrated Zen 4 chips early in 2023, but after the success of the 5800X3D, it would be silly not to explore what already works.
Back to the teething troubles, as far as we know, Intel is going to try and cut AMD off with the release of its 13th generation Intel CPUs. Now, a new software integration that may have issues, coupled with a new rival release, and nothing more to offer than the previous generation, could drive users into Intel’s arms.
If AMD extends the lifespan of Zen 3 and AM4 just long enough to get AM5 through its teething troubles, they could find a way to keep users.
If you do have to buy a new AM5 motherboard, you might as well buy an LGA 1700 motherboard and accompanying Intel CPU if AMD proves to be unstable or full of bugs.
We will update this article as more news and information about Zen 3D becomes available.