AMD is allegedly mixing two chip designs with the code name Cezanne (Zen 3) and Lucienne (Zen 2). The top model Ryzen 7 5800 U with eight Zen 3 cores, 16 Threads thanks to Simultaneous Multithreading (SMT) and 16 MByte level 3 cache start. AMD doubles the buffer memory compared to its predecessor Ryzen 7 4800 U.

The Ryzen 7 5600 U is supposed to be a new edition of the Ryzen 7 4800 U: nominally only with 100 to 200 MHz less clock frequency and still 8 MB L3 cache, but due to the Zen-2 architecture with less power per cycle. The same game at Ryzen 5 5600 vs. Ryzen 5 5500 U and Ryzen 3 5400 U vs. Ryzen 3 5300 U. The graphics architecture should continue to be based on Vega in both cases, with the top model Ryzen 7 5800 U with 512 but one shader core 250 MHz high clock increase to 2.0 GHz received.

The specifications come from Twitter user “ExecutableFix”. Rumors about a mix of two chip designs in AMD’s upcoming notebook series were circulating according to TechPowerUp as early as September 2020. The code name “Lucienne” and a matching order number (OPN) named Igor’s Lab in August 2020.

processor Architecture Cores / Threads Base / Boost clock L3 cache GPU TDP Ryzen 7 5800 U Cezanne / Zen 3 8th / 16 2.0 / 4.4 GHz 16 MByte Vega 8 , 2000 MHz 15 W Ryzen 7 5700 U Lucienne / Zen 2 8 / 16 1.8 / 4.3 GHz 8 MByte Vega 8, 1900 MHz 15 W Ryzen 5 5600 U Cezanne / Zen 3 6 / 12 2.3 / 4.2 GHz 12 MByte Vega 7, 1800 MHz 15 W Ryzen 5 5500 U Lucienne / Zen 2 6 / 12 2.1 / 4.0 GHz 8 MByte Vega 7, 1800 MHz 15 W Ryzen 3 5400 U Cezanne / Zen 3 4/8 2 , 6 / 4.0 GHz 8 MByte Vega 6, 1600 MHz 15 W Ryzen 3 5300 U Lucienne / Zen 2 4/8 2.6 / 3, 85 GHz 4 Mbytes Vega 6, 1500 MHz 15 W Differentiation by means of CPU architecture In the 2020 AMD differentiates the models through SMT: The Ryzen 7 4800 U is working 16 Threads from Ryzen 7 4700 U 8. The six-core Ryzen 5 4600 U comes on 12, the little brother Ryzen 5 4500 U to 6. With the successors there would be a gradation due to the different performance per measure (Zen 3 vs. Zen 2) with continuously activated SMT.