MSI GeForce RTX 5080 Vanguard SOC review – The better FE with the SUPRIM inner workings and the slightly cheaper outer skin

1 - Introduction, overview and technical data 2 - Test system and equipment 3 - Teardown: PCB, topology, compenents and cooler 4 - Material analysis and heat conducting materials 5 - Gaming performance 6 - Power consumption, load peaks, power supply recommendation 7 - Temperatures, clock rates and thermography 8 - Fan curves and operating noise 9 - Summary and conclusion

Teardown

When designing the MSI RTX 5080 Vanguard SOC, as with the RTX 5090 SUPRIM, MSI took care to simplify disassembly considerably. The backplate can be removed with just a few screws, which makes maintenance work or modifications easier. After loosening the slot bracket and disconnecting the five connection cables, the board can be carefully removed by removing the fastening screws and the clamping cross. Care should be taken, however, as a PTM pad, which helps to dissipate heat, may offer slight resistance when removing the board. A careful and even approach is important here to avoid damaging the hardware. This well thought-out design makes both repairs and any upgrades much easier.

Circuit board and components

The board has a solid and fairly durable design and, like NVIDIA’s reference design, relies on three large voltage rails and several smaller ones. The voltage converters for the NVDD as the actual GPU core voltage are nothing new. However, similar to Intel and AMD, NVIDIA now uses separate voltages for the GDDR7 memory and the frame buffer. While the voltage rails for the GPU cores and the memory are familiar, the frame buffer is new to NVIDIA in this form.

The frame buffer in a graphics card is a special area of the memory that is responsible for storing the pixel information of the displayed image. It contains data such as color depth, transparency and image resolution and is continuously updated by the GPU to enable image output on the monitor. The frame buffer is directly connected to the graphics memory, which operates under the voltage MSVDD. This memory provides the physical resource that the frame buffer accesses. In short, FBVDD ensures the stability and accuracy of data transfers between GPU and memory, especially at high clock rates.

The MSVDD voltage, on the other hand, regulates the operation of the memory chips themselves. This voltage directly influences the speed and stability of the memory, as it meets the electrical requirements of the memory cells and the memory controller logic. MSVDD and FBVDD work closely together, as the memory logic and the frame buffer must communicate with each other in order to exchange image data efficiently between GPU and memory. The separate regulation of MSVDD and FBVDD enables precise adjustment of the voltages to the respective requirements. The circuit board is not rocket science, but this time I didn’t have the time to measure the topology exactly. If there are still deviations from the statement with the voltages, I will of course update and add them. The custom board is at least very different from the reference design of the RTX 5080 and the FE. I don’t want to make a final decision yet, but I see 18 control loops here, i.e. 11 x NVVDD (core, 0.8 to 1.1 V) 4x MSVDD (memory, 0.8 to 1.1 V) 3 FBVDD (frame buffer, 0.9 to 1.24 V) and various other voltages.

The power supply of modern graphics cards such as the MSI GeForce RTX 5080 Vanguard SOC is based on the precise coordination of several control and power components. The MP29816 (this time on the back) is a highly efficient and complex PWM controller that regulates the GPU core voltage (NVVDD), memory voltage (MSVDD) and frame buffer voltage (FBVDD). These components are crucial for the stability and efficiency of the graphics card, as they supply the main load of the GPU and the memory. The MP29816 controls a multiphase system (IntelliPhase) that distributes the electrical and thermal loads while enabling precise voltage regulation.

The actual power regulation is performed in all control loops with higher loads by the MP87993 DrMOS modules from Monolith, which convert the signals controlled by the PWM controllers into the corresponding output voltages. These modules integrate the high-side and low-side MOSFETs as well as the gate drivers in a compact housing and are able to efficiently process the high currents of the NVVDD, FBVDD and MSVDD rails. Their design not only minimizes switching losses, but also saves space on the circuit board. The DrMOS components also ensure that the graphics card is protected by integrated safety mechanisms such as temperature and short-circuit protection.

There is also nothing sensational to be found on the rear. However, MSI, like NVIDIA, has only installed MLCC under the socket and no polymer caps. I already discussed the reasons for this years ago. In addition to the fuse and the shunt for the PEG, we also see the large PWM controller for NVVDD and MSVDD as well as a smaller one for FBVDD and the obligatory supervisor chip for power monitoring.

The NCP45492 can also be found here. This is a monolithic high-performance IC that can be used to simultaneously monitor bus voltages and currents on up to four high-voltage power supplies. Key features of the NCP45492 include the ability to translate and scale the shunt and bus voltages, as well as enabling the monitoring of up to four power supplies with a single device. Each channel is individually programmable through the selection of external resistors, allowing flexible customization for specific applications. In addition, the device offers a fast settling time and a real-time display of the validity of all bus voltages. This makes the chip ideal as a supervisor for the 12V lines (12V2X6 and PEG) of the power supply.

Here is a high-resolution microscopy view of all the important components:

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The cooler

The rear backplate is made of aluminum and cools the area under the GPU by means of an attached thermal pad, but this is the wrong place. More on this in the thermography section, because the hotspot is not there. The backplate not only contributes to the mechanical stability, but also improves the cooling, even if not quite optimally. Together with the central aluminum frame, the structural integrity of the card is additionally increased, which guarantees stable operation under high loads.

The massive cooler of the MSI GeForce RTX 5080 Vanguard SOC is designed for maximum efficiency and quiet operation, which is achieved through a combination of innovative technologies and high-quality materials. Cooling is made possible by an integrated vapor chamber, which serves as the primary heat dissipation element. It transports the heat directly from the GPU and the VRAM to the six so-called core pipes. These square-shaped heat pipes optimize thermal contact and ensure even heat distribution. The heat is then dissipated through a network of precision-manufactured fins which, in combination with Wave Curved 4.0 technology, increase the efficiency of the airflow and minimize turbulence.

The cooler’s fans, known as StormForce Fans, are each equipped with seven optimized fan blades that are specially textured for maximum airflow and reduced noise. In addition, the Zero-Frozr function offers the option of stopping the fans completely at low loads to enable silent operation. Another design element are the thermal pads, which I will discuss in more detail later, which ensure additional heat dissipation from critical components such as the voltage converters.

The cooling system of the MSI GeForce RTX 5080 Vanguard SOC represents a consistent further development and is largely identical to that of the SUPRIM. And yes, the radiator cover of the Vanguard is also supplemented by LED elements, which actively support the cooling, especially when they shine in deep blue. Not.