ASRock Radeon RX 6900 XT OC Formula Review - This Card is Fast 66

ASRock Radeon RX 6900 XT OC Formula Review - This Card is Fast

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

GPU voltage is powered by the expensive Infineon XDPE132G5D running 17 power phases.


International Rectifier TDA21490 DrMOS chips are used for GPU voltage. Note that these are rated for 90 A, whereas the chips on other RX 6900 XT cards are rated for 72 A only.

Memory Voltage, VRM Configuration
Memory Chip Voltage Controller

Memory voltage uses a four-phase design and is generated by an IRF35217 controller.


For memory, TDA21472 DrMOS chips are used.

Graphics Card Memory Chips

GDDR6 chips are made by Samsung, carry the model number "K4ZAF325BM-HC16," and are rated to run at 16 Gbps.

Graphics Chip GPU

Built on the same TSMC N7 (7 nm) node as Navi 10, the Navi 21 silicon is spread across a 519.8 mm² die area and packs 26.8 billion transistors. The pinkish-red tinge we saw on Navi 10 is gone.
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