Lenovo 5b21l84552 Planar Board Rtx 4090 16GB 83DE Series

Product Description

The LENOVO 5b21l84552 is a replacement planar board designed for Lenovo laptop systems in the 83DE product family. A planar board serves as the main logic board, integrating the processor socket, memory interfaces, GPU circuitry, and system bus connections into a single assembly. This board is configured with an Intel Core i9-14900HX processor and an NVIDIA RTX 4090 GPU with 16GB of dedicated graphics memory. Installation is performed by qualified computer hardware technicians with experience in laptop depot-level repair.

This planar board is matched to the 83DE series Lenovo laptop configuration, specifically the INI914900HX RTX 4090 16GRM build variant. It is suited for depot repair and warranty service scenarios where the original logic board has failed due to component fault, physical damage, or GPU failure. This is an OEM Lenovo part intended for direct board-level replacement in the applicable system chassis.

Key Features

• Integrated Intel Core i9-14900HX processor for high-performance mobile computing
• NVIDIA RTX 4090 GPU with 16GB dedicated graphics memory onboard
• OEM Lenovo replacement part for the 83DE series platform
• Direct drop-in replacement for depot-level board swap service
• Matches original factory configuration for the INI914900HX RTX 4090 16GRM build

Compatibility

Designed as an OEM replacement planar board for Lenovo 83DE series laptop systems configured with the Intel Core i9-14900HX processor and NVIDIA RTX 4090 16GB GPU variant.

Installation Notes

Planar board replacement should be performed by trained laptop depot technicians with experience in Lenovo system disassembly. Power down the system completely and disconnect the battery before beginning any board-level service. Follow applicable ESD precautions throughout handling and installation to prevent damage to sensitive board components. Refer to the Lenovo hardware maintenance manual for the applicable model before proceeding.

Technical Specifications

• Processor: Intel Core i9-14900HX
• GPU: NVIDIA RTX 4090
• GPU Memory: 16GB
• System Family: 83DE Series

Standard Information

• Brand: LENOVO
• Manufacturer Part Number: 5b21l84552