AMD 2nd Gen 3D V-Cache For Zen 4 To Offer Bandwidth of 2.5 TB/s

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Sajjad Hussain

At HI Digital I test and write about different hardware configurations to show other PC users what they can expect from their build. My end goal is to educate the masses to make the right decision when they are looking for new PC parts to buy

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AMD Ryzen 7000X3D lineup, including Ryzen 9 7900X3D, Ryzen 9 7950X3D, and Ryzen 7 7800X3D, is one of the fastest gaming processors on the planet. AMD has achieved this feat thanks to its unique 3D V-Cache technology.

AMD has also been improving its 3D chip stacking design and is now ready to share details regarding its new second-generation 3D V-Cache chiplet design.

The second-generation 3D V-Cache chiplet design uses the same 7nm manufacturing process but has an increased bandwidth of 2.5 TB/s compared to the 2 TB/s speed of its predecessor.

Moving forward with the cheaper and now mature 7nm manufacturing process for the second-generation 3D V-Cache design. The company is now looking into maximizing performance at a lower cost.

AMD is also currently the only company manufacturing 3D V-Cache chips with no competition from Intel, thus making them the fastest in gaming and specific applications.

To isolate the 3D V-Cache chiplet from the heat generation cores on the Zen 3 compute die or (CCD), AMD had to stack an additional L3 SRAM chiplet directly in the center. This provided Zen 3 chips with an additional 96 MB of cache, making it the fastest chip in latency-sensitive processes like gaming and applications.

Moving on with Zen 4, AMD had to make some alternations as Zen 4 chips used a new and smaller 5nm manufacturing process, while its 3D V-Cache chiplet was still based on the 7nm manufacturing process.

AMD went with a smaller 7nm SRAM die, which measures only 36mm2 compared to 41mm2 used on the Zen 3 chips. Furthermore, the total number of transistors remained the same at 4.7 billion.

This made the same 7nm chiplet design even more, denser than the Zen 4 5nm compute chiplet and 3x denser than the Zen 3 7nm compute chiplet, resulting in an increase in bandwidth of 25% to 2.5 TB/s.

Sajjad Hussain

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