High-resolution PCB Pictures

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

Circuit Board (PCB) Analysis

GPU voltage is a 17-phase design, managed by a Monolithic Power Systems MP2857 controller.


Monolithic MP87997 DrMOS components are used for GPU voltage; they are rated for 70 A of current each.


Memory voltage is a three-phase design, managed by a Monolithic Power Systems MP2856 controller.


For memory, Monolithic MP87997 DrMOS with a 70 A rating are used again.


On the Radeon RX 7900 XTX, AMD has added a fan intake temperature sensor that measures the temperature of the fresh air coming into the graphics card. Right now this temperature reading is not exposed anywhere, and AMD only made vague comments about the sensor's usage. In the reviewer's guide all they mention is: "We use this ambient fan intake case temperature monitor to dynamically adjust your performance so that enthusiasts with DIY systems with great case design and great airflow will get the performance benefits. In future, we are looking to expose this sensor readings to allow DIY'ers to use it to help them iteratively optimize their case build." I've sent AMD a bunch of additional questions and will update this review once I get answers. The Radeon RX 7900 XT does not have this sensor.


As mentioned before, the card has a USB-C DisplayPort-passthrough output. This chip enables that functionality, it supports USB PD 3.0,


The GDDR6 memory chips are made by Hynix and carry the model number H56G42AS8DX-014. They are specified to run at 2500 MHz (20 Gbps effective).


AMD's new Navi 31 graphics processor is the world's first GPU that uses a chiplet architecture. Note the large die in the center, called "GCD," graphics compute die, which houses the compute units, it is surrounded by six smaller "MCD," memory cache dies, that contain one memory controller interface and one slice of cache each. While they look similar, the MCDs are not HBM chips. The MCDs are fabricated on a 6 nm process at TSMC Taiwan with a die size of 36.6 mm² each, the GCD is fabricated using TSMC's 5 nanometer node, with a die size of 300 mm². The combined transistor count of the GPU is 57.7 billion.