AMD Ryzen 7 5800U Mobile Has Multi-Thread Performance Issues in Synthetic Benchmarks
Network sources have shared the performance results of the mobile AMD Ryzen 7 5800U processor in the synthetic tests GPU-Z and Cinebench. As a reminder, the Ryzen 5000 series chips based on the Zen 3 architecture will be unveiled next week. It will include both the energy-efficient Ryzen 5000U models with a TDP limited to 15W, and the high-performance Ryzen 5000H with a declared power consumption of 45W.
Zen 3
The Ryzen 7 5800U belongs to the first category of the above processors. This processor belongs to the Cezanne family and is built on the Zen 3 architecture. It should also be added that the Ryzen 5000 series will include the Lucienne chips based on the Zen 2 architecture, which are Refresh versions of the current mobile Renoir (Ryzen 4000).
The Ryzen 7 5800U has 8 cores and 16 virtual threads and operates in the 2.0-4.4 GHz frequency range. Compared to the predecessor of the Renoir series, the novelty on Zen 3 received twice the amount of cache memory of the 3rd level, 16 MB. In addition, compared to its predecessor, the base and boost frequencies of the Ryzen 7 5800U are 200 MHz higher.
In the synthetic CPU-Z test, the Ryzen 7 5800U processor scored 592 and 3812 points in single-threaded and multi-threaded tests, respectively. Curiously, in the first case, the performance of the AMD mobile chip turned out to be even higher than that of the current flagship desktop Intel Core i9-10900K, which scores 584 points in the same test. But the multithreaded performance of “red” is disappointing. Even the current Ryzen 7 4800U scores more than 5000 points in this test. Whether this is due to problems with simultaneous multithreading (SMT) or the “raw” BIOS of a laptop motherboard, which uses a Zen 3 chip, is unknown.
In Cinebench R20, the Ryzen 7 5800U scores 509 points in a single-threaded test and 3614 points in a multi-threaded one. In the fresh Cinebench, the R23 shows 1311 and 9326 in their respective benchmarks. Thus, the Ryzen 7 5800U is 6% faster in a single-threaded Ryzen 7 4800U, but at the same time, it is slower in a multi-threaded test.
