AMD Radeon RX 6400 Review 288

AMD Radeon RX 6400 Review

Test Setup »

High-resolution PCB Pictures

These pictures are for the convenience of volt modders and people who would like to see all the finer details on the PCB. Feel free to link back to us and use these in your articles, videos or forum posts.

Graphics Card Teardown PCB Front
Graphics Card Teardown PCB Back


High-res versions are also available (front, back).

Circuit Board (PCB) Analysis

GPU Voltage, VRM Configuration
GPU Chip Voltage Controller

The GPU VRM is a two-phase design powered by an NCP81022 controller.


For the GPU voltage, a classic dual MOSFET configuration is used, provided by the Nikosem PK698SA and PK9168A, which are rated for 40 A.

Memory Voltage, VRM Configuration
Memory Chip Voltage Controller

The memory VRM is two-phase, too, and powered by a second NCP81022 controller.


For memory, a pair of Alpha & Omega AONR36366/AONR36368 is used for each phase, rated for 35 A.

Graphics Card Memory Chips

The GDDR6 memory chips are made by Micron and carry the model number D9ZPP, which decodes to MT61K512M32KPA-16. They are specified to run at 2000 MHz (16 Gbps GDDR6 effective).

Graphics Chip GPU

AMD's Navi 24 graphics processor is the company's smallest RDNA 2 chip. It is fabricated using a 6 nanometer production process at TSMC Taiwan, its transistor count is 5.4 billion, and the die size is 107 mm².
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