AMD’s V-Cache Tested: slightly increased latency, better actual performance

At the CES 2022 exhibition, AMD launched a Zen 3 architecture desktop processor with 3D vertical cache technology, namely the Ryzen 7 5800X3D. This technology can bring an additional 64MB of 7nm SRAM cache to each CCD, making the processor’s L3 cache capacity triple from 32MB to 96MB. In addition, the EPYC processor code-named Milan-X also uses this technology.

Recently, Chips and Cheese tested the AMD EPYC 7V73X processor with 3D vertical cache technology, involving cache latency and other items. The test results can also be used as a reference for the consumer-grade Ryzen 7 5800X3D processor. The AMD EPYC 7V73X processor has 64 cores and 128 threads, a total of 768MB of L3 cache, the base clock is 2.2 GHz, the boost clock is 3.5 GHz, and the TDP is 280W.

The test results show that after adding the 3D vertical cache technology, the latency of the L3 cache will increase slightly, about 3 to 4 cycles. The small increase is offset by the performance boost from the larger cache. Although the base frequency of EPYC 7773X is higher than that of EPYC 7V73X, the actual performance of EPYC 7V73X is stronger, thanks to the higher boost clock, the Ryzen 7 5800X3D processor may have similar performance.

According to AMD’s introduction at CES 2022, the performance of the Ryzen 7 5800X3D processor in 1080P games is 15% higher than that of the Ryzen 9 5900X, comparable to Intel’s latest Core i9-12900K, and even better in some games. AMD has only offered the Ryzen 7 5800X3D at the consumer level for the time being, and it is uncertain whether there will be a Ryzen 9 5900X3D or Ryzen 9 5950X3D with 3D vertical cache technology in the future.