Most AI PCs lean on an NPU for a limited set of on-device features. HP’s ZBook Ultra G3a 16 takes a different route: it can be configured with up to 192GB of unified memory, with as much as 160GB assigned to graphics workloads. That is the central feature of this 16-inch mobile workstation, which is intended to run demanding professional applications and local AI models without making the cloud a requirement for every task.
At the top end, HP says the system can run language models with up to roughly 300 billion parameters locally. That ceiling depends heavily on the model, its quantization, the application, and the working context, so it is not a promise that every 300B model will perform quickly. Still, the unusually large memory pool addresses a major limitation of conventional laptops: fitting a large model alongside the data and workstation software needed to use it.
A workstation built around shared memory
The ZBook can be configured with an AMD Ryzen AI Max+ PRO 495 processor, up to 16 CPU cores, an NPU rated at up to 55 TOPS, and integrated AMD Radeon graphics. Rather than splitting system RAM and dedicated video memory into separate pools, the platform shares memory between CPU and graphics resources. For visualization, AI inference, and other graphics-heavy jobs, HP allows up to 160GB of that unified memory to be allocated as graphics memory.
HP is targeting architects, engineers, designers, developers, and similar users who need to keep sensitive project material local. Its Perplexity collaboration is meant to bring AI agents into professional workflows, including work involving the following applications:
- Autodesk Revit 2027, through the announced Perplexity Portable Computer for Windows integration
- Autodesk 3ds Max
- Chaos Enscape
The premise is that project files, technical documents, specifications, and 3D assets can remain on the workstation, while a cloud service is used only when a user chooses to access a larger model or additional compute capacity. For firms weighing recurring cloud costs, latency, and control of proprietary data, that distinction could matter more than a bundled chatbot.
More power without desktop-replacement weight
HP has raised the maximum thermal design power to 100W, compared with 55W on the prior ZBook Ultra G1a. The company says the new model uses two centrally located fans, a larger vapor chamber, and BIOS-level power management that shifts available power based on the active application.
Despite that higher power target, the ZBook Ultra G3a 16 starts at about 4.2 pounds and measures about 0.7 inches thick. It is not a tablet-like portable, but it is notably more mobile than the multikilogram desktop-replacement workstations that have traditionally housed this class of professional hardware.
- Display options include a 2.8K OLED panel with up to a 120Hz refresh rate and 500 nits of brightness.
- A DreamColor 4K display is available with a 120Hz refresh rate.
- A QHD NEO display option also supports a 120Hz refresh rate.
- Storage can reach 8TB through PCIe 5.0 NVMe SSDs.
- The battery is rated at 96Wh, with HP claiming up to approximately 16.5 hours in certain internal tests.
- Connectivity includes Wi-Fi and Bluetooth, with optional 5G through HP Go.
Ports and serviceability round out the workstation focus
The machine supports Windows 11 Pro or Ubuntu 26.04 LTS and includes Thunderbolt 4/40Gbps USB-C, 10Gbps USB-C, USB-A, HDMI 2.1, a headphone jack, and a microSD card reader. HP also lists HP Wolf Security and ISV certifications for professional applications.
One practical feature for managed fleets is the quick-swap keyboard, which HP says IT departments can replace without fully disassembling the system. That is a small detail beside the AI hardware, but it suits a workstation expected to remain in service for years.
HP says the ZBook Ultra G3a 16 has been globally available since October, though U.S. pricing was not provided in the available information. It is clearly not aimed at typical AI-PC buyers: the appeal is for mobile professionals whose local models, 3D projects, and confidential data need more memory than mainstream laptops can provide.
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