Gaming PC

Unannounced Zen 4-Based Phoenix Mobile CPU Hits Nearly 5GHz

bench leak twitter (opens in new tab) share Geekbench 5 Benchmark (opens in new tab) Here’s the result of a mysterious low-power Ryzen 7000 mobile Phoenix CPU (in this case ‘Mayan-PHX’) that wasn’t announced at AMD’s press event at CES 2023. The new chip will be called the Ryzen 5 7640U and it will be powered by AMD’s cutting-edge Zen 4. Architecture and RDNA3 760M graphics engine. If the Geekbench 5 spec sheet is correct, the chip will reportedly feature 6 cores, 12 threads, and a boost clock of 4.9GHz.

The new chip delivered results of 1,869 points in single-core benchmarks and 8,853 points in multi-core tests. Compared to the chip’s predecessor, the Ryzen 5 6600U, the Ryzen 5 7640U is 33% faster in single-core benchmarks and 50% faster in multi-core benchmarks.

For your reference, first page We’ve averaged the Ryzen 5 6600U results into a single score. This yielded a result of 1,404 points for single-core and 5,916 points for multi-core. This helps track how the chip is performing overall and takes into account different notebook chassis where the chip may be operating in different power envelopes. Keep in mind, however, that Geekbench 5 scores are not an accurate way to measure real-world CPU performance.

(Image credit: Geekbench)

AMD’s Ryzen 5 7640U is the first U-series part we’ve seen so far to feature AMD’s Phoenix design language. Ironically, the 7640U model name was used to represent AMD’s new nomenclature for his upcoming Ryzen mobile processors, but was never announced as his actual SKU. This is just an example. Or so I thought.

AMD’s Phoenix CPU design is currently the most advanced design in the Ryzen 7000 brand. The architecture includes AMD’s Zen 4 architecture running on TSMC’s 4nm manufacturing node which is the smallest lithography ever brought to Ryzen. It’s also the only design to incorporate his RDNA 3 architecture integrated graphics unit from AMD’s new Radeon 700M series, a sound upgrade to his RDNA 2 solution from the previous generation. Additionally, Phoenix is ​​also currently the only Ryzen 7000 design to include optional support for AMD’s Ryzen AI engine.

The only chips AMD has announced in the Ryzen 7040 class so far are the HS SKUs which include the Ryzen 9 7940HS, Ryzen 7 7840HS and Ryzen 5 7640HS. They all have a TDP of 35-45W. Meanwhile, AMD’s Ryzen 5 7640U looks to be one of the first Zen 4 Phoenix class chips to feature a TDP of 28W or less due to the ‘U’ series nomenclature.

If the Geekbench 5 numbers are similar to the real world performance numbers, this chip would be a significant upgrade from its Ryzen 5 6600U predecessor. AMD’s Phoenix-class CPUs are set to arrive this year, among other mobile designs like Rembrandt-R, Barcelo-R and Mendocino, so we should see notebooks featuring the 7640U soon.

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