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AMD's Ryzen 9 9950X3D2 Dual Edition crams 208MB of cache into a single chip

March 28, 2026
•Ars technica
AMD's Ryzen 9 9950X3D2 Dual Edition crams 208MB of cache into a single chip

Here's something that caught my attention — AMD just dropped a new Ryzen chip with a mind-blowing amount of cache. And get this — it's called the Ryzen 9 9950X3D2 Dual Edition, and it packs a whopping 208MB of cache into a single chip. According to Andrew Cunningham at Ars Technica, unlike previous models that used a hybrid setup with cache on separate chiplets, this one stacks 64MB of 3D V-Cache on both dies. That’s a huge jump from the usual, making it up to 10% faster in gaming and cache-heavy tasks. Now, here’s where it gets interesting: AMD’s approach simplifies things, avoids some of the software quirks and errors seen with earlier models, and boosts performance in a way that really matters if you're into gaming or intensive apps. So what does this mean for you? Better speed, fewer headaches, and a chip that’s pushing the limits of what’s possible with cache. As Andrew Cunningham reports, this could be a game-changer for high-end desktop setups.

For about four years now, AMD has offered special "X3D" variants of its high-end desktop processors with an extra 64MB of L3 cache attached, an addition that disproportionately benefits games. AMD calls this "3D V-Cache" because it stacks the cache directly on top of (for Ryzen 5000 and 7000) or beneath (for Ryzen 9000) the CPU die.

The 12- and 16-core Ryzen chips have their CPU cores split between two silicon chiplets, which has historically made the 7900X3D, 7950X3D, 9900X3D, and 9950X3D a bit weird. One of their two CPU chiplets has the 64MB of 3D V-Cache attached, and one does not. AMD relies on its driver software to make sure that software that benefits from the extra cache is run on the V-Cache-enabled CPU cores, which usually works well but is occasionally error-prone.

Enter the Ryzen 9 9950X3D2 Dual Edition, a mouthful of a chip that includes 64MB of 3D V-Cache on both processor dies, without the hybrid arrangement that has defined the other chips up until now. This gives the chip a grand total of 208MB of cache—16MB of L2 cache, the 32MB of L3 cache built into each of the two CPU dies (for a total of 64MB), and then another 64MB chunk of 3D V-Cache per die. In total, AMD says the new chip should be as much as 10 percent faster than the 9950X3D in games and other apps that benefit from the extra cache.

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For about four years now, AMD has offered special "X3D" variants of its high-end desktop processors with an extra 64MB of L3 cache attached, an addition that disproportionately benefits games. AMD calls this "3D V-Cache" because it stacks the cache directly on top of (for Ryzen 5000 and 7000) or beneath (for Ryzen 9000) the CPU die.

The 12- and 16-core Ryzen chips have their CPU cores split between two silicon chiplets, which has historically made the 7900X3D, 7950X3D, 9900X3D, and 9950X3D a bit weird. One of their two CPU chiplets has the 64MB of 3D V-Cache attached, and one does not. AMD relies on its driver software to make sure that software that benefits from the extra cache is run on the V-Cache-enabled CPU cores, which usually works well but is occasionally error-prone.

Enter the Ryzen 9 9950X3D2 Dual Edition, a mouthful of a chip that includes 64MB of 3D V-Cache on both processor dies, without the hybrid arrangement that has defined the other chips up until now. This gives the chip a grand total of 208MB of cache—16MB of L2 cache, the 32MB of L3 cache built into each of the two CPU dies (for a total of 64MB), and then another 64MB chunk of 3D V-Cache per die. In total, AMD says the new chip should be as much as 10 percent faster than the 9950X3D in games and other apps that benefit from the extra cache.

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