Lenovo

Lenovo 21A4002HUS-3982-28663 ThinkBook 15 G3 Ryzen 5 Laptop + Dock

1920x1080Ryzen 5 5500U20GB DDR465WBluetooth 5.2

Six cores, 20GB RAM, and a full docking station transform this ThinkBook 15 into a complete workstation at a mid-range price point.

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Overview

The Lenovo ThinkBook 15 G3 pairs AMD's Ryzen 5 5500U — a six-core Zen 3 processor with a 2.1GHz base and 4GHz boost clock — with 20GB of DDR4 RAM across a soldered-plus-DIMM configuration. That memory setup is notable: the single open SO-DIMM slot means upgradability is real, not theoretical. Storage is a 256GB M.2 SATA SSD, which delivers adequate sequential throughput for productivity tasks but sits well below the 3,000MB/s+ ceiling of PCIe NVMe. The 15.6-inch 1080p IPS panel runs at 60Hz — accurate enough for document and spreadsheet work, unremarkable for anything else. Connectivity covers Wi-Fi 6, Bluetooth 5.2, two USB 3.2 Gen1 Type-A, two USB 3.2 Gen2 Type-C, HDMI, and RJ-45 Ethernet built in.

What distinguishes this SKU is the included Lenovo Universal Dock D6000, which transforms the ThinkBook into a credible workstation replacement. The D6000 supports dual-monitor output via DisplayPort and HDMI alongside expanded USB and Gigabit Ethernet — connecting via a single cable to keep the desk clean. This bundle is aimed squarely at small business users and home office workers who need a portable machine that docks into a full desktop environment without investing in separate peripherals. It runs Windows 10 Pro, adding BitLocker encryption and Remote Desktop functionality that Home editions lack. Users who require heavier storage, a sharper display, or discrete GPU performance will find the ThinkBook 15 G3 constraining — but for document-heavy, multi-app productivity workflows, the CPU and RAM headroom hold up well.

Key Features

15.6" Full HD (1920x1080) 60Hz IPS Display; 802.11ax Wifi, Bluetooth 5.2, Ethernet LAN (RJ-45), 720p HD Webcam, Backlit, .

AMD Ryzen 5 5500U Hexa Core 5th Gen AMD Ryzen 5 5500U 2.10GHz Processor

20GB DDR4 RAM (4GB Onboard + 16GB SODIMM); 65W Power Supply, 3-Cell 45 WHr Battery; Mineral Grey Color, .

256GB SATA SSD; 2 USB 3.2 Gen1, 1 HDMI, 2 USB 3.2 Type-C Gen2, Windows 10 Pro-64.,

Includes Universal Dock D6000

Specifications

Display Size
15.6"
Display Resolution
Full HD (1920x1080)
Refresh Rate
60Hz
Display Panel Type
IPS
Processor
AMD Ryzen 5 5500U Hexa Core
Processor Generation
5th Gen
Processor Speed
2.10GHz
RAM
20GB DDR4 (4GB Onboard + 16GB SODIMM)
Storage
256GB SATA SSD
Operating System
Windows 10 Pro-64
Wireless Connectivity
802.11ax Wifi, Bluetooth 5.2
Wired Connectivity
Ethernet LAN (RJ-45)
Webcam
720p HD Webcam
Keyboard
Backlit
Power Supply
65W
Battery
3-Cell 45 WHr Battery
Color
Mineral Grey
USB Ports
2 USB 3.2 Gen1, 2 USB 3.2 Type-C Gen2
Video Output
1 HDMI
Included Accessory
Universal Dock D6000

Pros & Cons

👍 Pros

  • Ryzen 5 5500U delivers strong multi-threaded productivity throughput with a 4GHz boost clock across six cores.
  • 20GB DDR4 RAM (with one SO-DIMM slot free) supports heavy multitasking and leaves a clear upgrade path to 32GB.
  • Bundled D6000 dock adds triple-monitor output and full desktop connectivity without purchasing peripherals separately.
  • Wi-Fi 6 (802.11ax) and Bluetooth 5.2 future-proof wireless performance for modern networks.
  • Windows 10 Pro license includes remote desktop, BitLocker, and enterprise management features not available on Home SKUs.

👎 Cons

  • 256GB SATA SSD is a tight capacity constraint for any user storing local project files, media, or VMs — sequential speeds also cap below NVMe alternatives.
  • 60Hz IPS display refresh rate shows its age next to competing laptops at this price shipping 90Hz or 120Hz panels.
  • 720p webcam delivers below-average image quality by current standards — inadequate for professional video calls without an external camera.
  • AMD Radeon integrated graphics cannot drive demanding GPU workloads — no discrete GPU means no CUDA support and limited CAD/render acceleration.
  • Battery rated at 45WHr is on the smaller end for a 15.6" chassis, limiting unplugged runtime under load.

Frequently Asked Questions

The 20GB total splits into 4GB soldered onboard plus a 16GB SO-DIMM — meaning one slot is occupied and one remains free for a future upgrade to 32GB. In practice, 20GB gives comfortable headroom for 20–30 Chrome tabs, Office apps, and background processes simultaneously without paging to disk.
The 5500U is a Zen 3-based hexa-core running 2.1GHz base with a 4GHz boost. It trades blows with the Intel Core i5-1135G7 in multi-threaded workloads and typically wins in sustained productivity tasks due to better IPC efficiency. It is not a gaming chip — the integrated Radeon graphics are suited for 2D workflows, not 3D rendering.
The Lenovo Universal Dock D6000 adds dual DisplayPort and HDMI outputs (supporting up to three monitors total when combined with the laptop's built-in HDMI), multiple USB-A and USB-C ports, and Gigabit Ethernet — all through a single cable connection to the laptop. It effectively turns the ThinkBook into a desktop workstation at your desk.
Yes, at the storage level. SATA SSDs top out around 550MB/s sequential read, whereas NVMe PCIe drives deliver 3,000–7,000MB/s. For productivity work — documents, email, web — the difference is rarely felt day-to-day. For large file transfers or video editing, the SATA ceiling becomes a measurable constraint.
It ships with Windows 10 Pro 64-bit. The Ryzen 5 5500U meets Windows 11 hardware requirements (TPM 2.0, Secure Boot capable), so an in-place upgrade to Windows 11 is supported at no cost.