AMD launched the Ryzen 7 5800X3D in 2022, bringing the world’s first processor with 3D V-Cache to market. It remains one of the best gaming CPUs available in 2023, offering credible competition to AMD’s Ryzen 7000 series and Intel’s Raptor Lake processors. It’s no longer alone, though, with newer Ryzen 7000-series 3D VCache CPUs poised to offer even greater gaming performance.
With AMD’s latest Ryzen 7000 generation now launched, here’s everything you need to know about 3D V-Cache.
What is AMD 3D V-Cache?
AMD 3D V-Cache is a packaging technology that stacks additional layers of cache on top of a CPU. It sounds complex, and from an engineering perspective, it is, but it’s not hard to understand what AMD’s tech is doing. Instead of laying the cache next to the processor, as has been traditionally done, AMD is stacking the cache on top to squeeze more on the chip.
It’s a different way to lay out a processor, and thanks to advancements in how CPU makers put components on a chip, AMD is able to squeeze on more cache without making a massive CPU. Originally, 3D V-Cache was restricted to an eight-core CPU in the 5800X3D, however, with the Ryzen 7000 generation, AMD introduced the eight core 7800X3D, the 12-core 7900X3D, and the 16-core 7950X3D.
However, this isn’t the whole picture. While those higher-end CPUs do feature more than eight cores, the 3D V-Cache is only applied to one of their core complex dies (CCD). In the case of the 7900X3D, it has six cores with 3D V-Cache available, clocked at a lower boost clock, while the other CCD doesn’t have the 3D V-Cache, but is able to operate at higher frequencies. The same goes for the 7950X3D, which has eight cores with 3D V-Cache and eight cores running at the higher boost clock.
The idea is to give a gaming advantage, while still having the high-speed cores available for tasks that demand clock speed more than cache. It’s part of why AMD was able to deliver greater productivity performance in certain applications with these CPUs, at least according to its first-party test numbers. It also claims to have worked extensively with Microsoft and game developers to ensure that the unique scheduling needs of such a CPU are met and catered for so that games and applications can best take advantage of these intriguing CPUs.
How does 3D V-Cache work?
Your processor has three levels of cache, with the lowest being L3, or level 3, cache. Each cache level is smaller in size, but faster in speed, acting as a memory chain to your processor that can serve up instructions as they’re needed.
Think about cache like a supply chain. Your RAM is like a national warehouse, the L3 cache is a regional distribution center, and so on through the L2 and L1 caches. For 3D V-Cache, we’re talking about additional L3 cache, the slowest level on your CPU. That’s only relatively slow, though — each cache layer is still significantly faster than your hard drive or RAM.
More L3 cache allows the processor to stream and store more instructions, decreasing the number of times it needs to pull instructions from RAM. With the 5800X3D running at lower clock speeds because of limitations of the 3D V-Cache voltage and temperature thresholds, it was great in gaming, but some tasks suffered. With the Ryzen 7000 3D V-Cache CPUs that offer both high clock speeds on some cores and V-Cache on others, AMD hopes to have solved that problem.
