The first benchmarks of AMD's Ryzen 5 7640U "Phoenix" CPU for thin and light laptops have leaked and show an impressive improvement over its predecessor.

AMD Ryzen 5 7640U "Phoenix" 6-Core Laptop CPU Shows Up To 60% Faster Performance Than Its Rembrandt Predecessor

While AMD has announced its Ryzen 7040 Phoenix CPU lineup for laptops, the company only lists the HS and H-series variants while there are no official listings of the U-series. The red team will be launching the U-series parts in laptops later in the coming quarter and one such variant has now appeared within the Geekbench database. In fact, this is one of the first Ryzen 7000 CPUs that AMD confirmed when it announced its new laptop branding scheme back in 2022.

The AMD Ryzen 5 7640U will be carrying the latest Zen 4 core architecture fabricated on the 4nm process node. The CPU will feature 6 cores, 12 threads, 6 MB of L2 cache, and 16 MB of L3 cache. Geekbench lists the clock speeds for the chip at 3.5 GHz base and around 4.9 GHz boost clocks. It will be a 15-28W part since it falls under the U-series. The chip will also feature an RDNA 3 iGPU, a Radeon RX 760M with 8 Compute units. The clock speed is unknown but it will definitely run at a lower frequency than the 2.6 GHz clocks we get on the HS/H variants.

AMD seems to have tested this chip themselves as it was spotted on the Mayan-PHX reference evaluation platform for the Phoenix Ryzen 7040 CPUs. The platform was running 16 GB memory though we don't know if it was LPDDR5X or standard LPDDR5. We also don't know what TDP it is running at and that could lead to much higher or lower scores depending on what the OEM goes with.

With that said, the AMD Ryzen 5 7640U "Phoenix" CPU definitely is faster than its predecessor. In single-core, the chip ends up with around 25% better performance and in multi-core, it scores a 60% faster performance given that the average Ryzen 5 6600U scores around 1600 points in the single-core and 5500 points in the multi-core tests. The CPU also beats the Ryzen 9 6900HX in the single-core tests but loses in the multi-core tests by a slight margin due to the former having more cores and threads.

AMD Ryzen 5 7640U Phoenix CPU Geekbench Benchmark (Single-Core)

Single-Core Score

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Core i9-13980HX 2.1k

Core i9-13900HX 2k

Core i9-12900H 2k

Core i9-12900HX 1.9k

Core i9-13900HK 1.9k

Ryzen 5 7640U 1.9k

Core i9-12950HX 1.9k

Core i7-12850HX 1.8k

Core i7-13700H 1.8k

Core i5-12600HX 1.6k

Ryzen 9 6900HX 1.6k

Core i9 11980HK 1.6k

Ryzen 7 6800U 1.6k

Ryzen 5 6600U 1.6k

Ryzen 5980HX 1.5k

Ryzen 9 5900HX 1.4k

AMD Ryzen 5 7640U Phoenix CPU Geekbench Benchmark (Multi-Core)

Multi-Core Score

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Core i9-13980HX 22.1k

Core i9-13900HX 20.9k

Core i9-12900HX 16k

Core i9-12900H 14.5k

Core i9-12950HX 13.7k

Core i9-13900HK 12.4k

Core i7-12850HX 12k

Core i7-13700H 10.8k

Ryzen 9 6900HX 10.2k

Core i9 11980HK 9.1k

Ryzen 5 7640U 8.9k

Ryzen 5980HX 8.2k

Ryzen 7 6800U 8.1k

Core i5-12600HX 8k

Ryzen 9 5900HX 7.6k

Ryzen 5 6600U 5.5k

It will be interesting to see how well the AMD Ryzen 7040U series does against the competition. The lower TDP will result in very efficient laptop designs which should be priced nicely. Given that most of the designs will not require a dGPU since the iGPU would be more than enough for the majority of tasks, these would be great machines for businesses and students who just want something that can get their work done while having loads of battery time at hand.

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AMD Ryzen 7040 "Phoenix" & Ryzen 8040 "Hawk Point" Laptop APUs: