
Lenovo ThinkPad X13 Gen 4 AMD laptop review: Compact Ryzen machine with mediocre performance
AMD Ryzen 7 PRO 7840U | AMD Radeon 780M | 13.30" | 1.3 kg
The AMD Ryzen 7 PRO 7840U is a fast high-end laptop processor of the Phoenix series and fastest model of the U-series. It offers 8 cores (octa core) based on the Zen 4 architecture that supports hyperthreading (16 threads). The cores clock from 3.3 (base) up to 5.1 GHz (single core boost). The processor includes 8 MB L2 cache and 16 MB L3 cache.
Compared to the consumer Ryzen 7 7840U, the PRO models offer additional security, manageability, and reliability features designed for professional users and workstation environments.
The performance of the R7 PRO 7840U is, depending on the workload, only slightly below the Ryzen 7 7840HS (higher base clock speed and TDP). Compared to the previous generation Ryzen 7 PRO 6850U, the 7840U is clearly faster thanks to the Zen 4 architecture and higher clock speeds.
The chip integrates a modern and fasts RDNA 3 graphics card (iGPU) called Radeon 780M with 12 CUs and up to 2.7 GHz clock speed. Furthermore, the Phoenix series include a video engine with AV1 de- and encoding, a new Xilinx FPGA based XDNA AI accelerator (Ryzen AI) that should be faster than the AI engine in the Apple M2 SOC and a dual-channel DDR5-5600 / LPDDR5x-7500 memory controller (with ECC support). The connectivity features includes 2 possible USB 4 (40 Gbps) ports and 20 PCIe 4.0 lanes for a GPU and SSDs.
The Phoenix series uses a single monolithic design (unlike the chiplet design of the 7045HX series) and is manufactured in the modern 4nm process at TSMC. The TDP can be configured between 15 and 30 Watt.
Codename | Phoenix (Zen 4) | ||||||||
Series | AMD Phoenix (Zen 4) | ||||||||
Series: Phoenix (Zen 4) Phoenix (Zen 4)
| |||||||||
Clock Rate | 3300 - 5100 MHz | ||||||||
Level 1 Cache | 512 KB | ||||||||
Level 2 Cache | 8 MB | ||||||||
Level 3 Cache | 16 MB | ||||||||
Number of Cores / Threads | 8 / 16 8 x 5.1 GHz AMD Zen 4 | ||||||||
Power Consumption (TDP = Thermal Design Power) | 28 Watt | ||||||||
Manufacturing Technology | 4 nm | ||||||||
Die Size | 178 mm2 | ||||||||
Max. Temperature | 100 °C | ||||||||
GPU | AMD Radeon 780M ( - 2700 MHz) | ||||||||
64 Bit | 64 Bit support | ||||||||
Architecture | x86 | ||||||||
Announcement Date | 05/03/2023 | ||||||||
Product Link (external) | www.amd.com |
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