In June, AMD released the EPYC97x4 series processors using Zen4c Lite architecture, targeting high-density cloud-native applications. On the consumer side, although there has been no official confirmation, various evidence shows that the two entry-level products Ryzen 57540U and Ryzen 37440U are the first to use large and small core designs, and Zen4 is paired with Zen4c.
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Now, we finally see the internal structure diagram of the large and small core design for the first time. We can see two Zen4 large cores, four Zen4c small cores, and the GPU core display part.
According to relevant data, the chip area of this design is 137 square millimeters , with up to 6 CPU cores and 4 GPU cores, two large and four small.
Ryzen 77840U and Ryzen 57640U have up to eight Zen4 CPU cores and 12 GPU cores, with a total area of 178 square millimeters . The difference between the two is 23%.
But note that they are all 4nm processes, while on the server side, the EPYC97x4 series is a 5nm process.
AMD officials clearly stated that under the 5nm process, the Zen4 core plus L2 cache is 3.84 square millimeters, and the Zen4c core plus L2 cache is 2.48 square millimeters, which is a full 35% reduction.
It is worth mentioning that AMD’s Ryzen Z1 series, designed specifically for handheld computers, is also suspected of being a large and small core design. After all, the specifications are too similar to the Ryzen 57540U.