Technology glossary

AMD Ryzen 9 9955HX

AMD’s 16-core Zen 5 high-end laptop processor; the standard-cache sibling of the 3D V-Cache 9955HX3D.

The Ryzen 9 9955HX has 16 cores and 32 threads, a 2.5 GHz base and up to 5.4 GHz boost clock. It has 16 MB of L2 and 64 MB of L3 cache; the Ryzen 9 9955HX3D with 128 MB of L3 is a separate processor.

Default TDP is 55 W, configurable by the maker from 55 to 75 W. The CPU cores are made on TSMC 4 nm and the I/O die on 6 nm.

It supports dual-channel DDR5-5600 SO-DIMM memory up to 96 GB and 28 lanes of PCIe 5.0. The integrated Radeon 610M is for basic display duties; gaming laptops pair it with a discrete graphics card.

Devices using this technology

Laptops · 2025

MSI Vector A18 HX A9WIG-223US

The Vector A18 HX A9WIG-223US is MSI’s 18-inch desktop-replacement gaming laptop released in 2025. It has a 16-core AMD Ryzen 9 9955HX, an RTX 5080 Laptop GPU (16 GB GDDR7) running up to 175 W, 32 GB of DDR5-5600, a 1 TB PCIe Gen4 SSD and an 18-inch 2560 × 1600 240 Hz IPS-level display, plus two USB4 ports, HDMI 2.1, 2.5 GbE and Wi-Fi 7. Independent tests praised gaming performance and cooling, with temperatures of 74–77 °C under gaming; the 3.6 kg weight, 400 W adapter and short battery life were the biggest drawbacks.

Sources

  1. AMD: Ryzen 9 9955HX specifications