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AMD Ryzen 7 5800U "Cezanne" Based on "Zen 3," Geekbenched

AMD's main competitor to Intel's 11th Gen Core "Tiger Lake" processor in the mobile space, the Ryzen 5800U, will introduce the same kind of generational IPC improvements over the Ryzen 4800U "Renoir" as the Ryzen 5000 desktop processors introduced over their Ryzen 3000 predecessors. Based on the 7 nm "Cezanne" silicon, the new Ryzen 7 5800U processor was put through Geekbench 5.1.1, where it yielded performance numbers of 1491 points single-threaded, and 6450 points multi-threaded. HotHardware comments that these numbers reflect a major IPC increase.

With the Ryzen 5000U series, AMD is taking a very confusing approach to the processor model stack, with half the parts based on the older "Zen 2" microarchitecture and "Lucienne" silicon, and the other half "Zen 3." The model number scheme goes as 5x00U, where if "x" is an odd number, the chip is "Zen 2" based, and if it's an even number, it is "Zen 3" based. For example, the 5800U is based on "Zen 3," whereas the 5700U is based on "Zen 2." Find the 5800U Geekbench 5 validation here. The Geekbench database listing also confirms that much like with the 8-core "Zen 3" chiplets on the Ryzen 5000 "Vermeer" desktop processors, "Cezanne" features an 8-core "Zen 3" CPU that does away with the 4-core CCX arrangement, and features a single 8-core CCX with a monolithic 16 MB L3 cache—a doubling in overall L3 cache amount compared to "Renoir," and a quadrupling in addressable L3 cache by each core.

Leaked AMD Ryzen 5000 Mobile Lineup Shows Significant Performance Boosts

AMD has attempted to fix their mobile processor naming situation with the launch of Ryzen 5000 desktop processors, by skipping Ryzen 4000 on desktop AMD has brought their mobile and desktop processor generations under the one naming scheme. However, it seems this naming scheme simplification hasn't gone as well as expected with leaked specifications for the upcoming Ryzen 5000 mobile series showing a mix of Zen 2 and Zen 3 processors. The leaked processors include the AMD Ryzen 3 5300U (Zen 2), Ryzen 3 5400U (Zen 3), Ryzen 5 5500U (Zen 2), Ryzen 5 5600U (Zen 3), Ryzen 7 5700U (Zen 2), and the Ryzen 7 5800U (Zen 3).

These new processors will maintain the core counts of their Ryzen 4000 predecessors while gaining a modest bump to base and boost speeds. These clock speed improvements will be accompanied by the claimed 19% IPC uplift on the Zen 3 based processors. The processors will also benefit from increased Vega iGPU cores and iGPU clock speed boosts. This combination should offer significantly improved performance over previous generation Ryzen 4000 mobile processors which already offered strong performance against Intel's offerings. AMD is expected to officially announce these processors at an event in January with prices slightly above previous generations.

AMD "Lucienne" Silicon to Power Certain Ryzen 5000 Series APUs

There's been much chatter in the social media about a new piece of AMD APU silicon, codenamed "Lucienne." It's being rumored that "Lucienne" is a refresh of the current-generation "Renoir" silicon, and is an APU with eight "Zen 2" CPU cores and eight "Vega" NGCUs. One of the first SKUs based on the die is the Ryzen 7 5700U, which surfaced on the AoTS benchmark database.

The 5700U is possibly a 15 W ultra-portable processor, and according to the AoTS benchmark screenshot, it comes with an 8-core/16-thread CPU (the 4700U is 8-core/8-thread). The addition of SMT helps the 5700U shore up much of its performance lead over the 4700U. It also turns out that the Ryzen 5000 will see two APU dies driving AMD's product-stack, with "Lucienne" powering the Ryzen 5 5500U and Ryzen 7 5700U; while the newer "Cezanne" die, which introduces "Zen 3" CPU cores, powers the Ryzen 5 5600U and the Ryzen 7 5800U.
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