Temperature curve
The temperature curves of a GPU differ significantly between constant stress tests and dynamic gaming scenarios, which is due to the different load profiles and the use of modern power management technologies. In a stress test, the GPU is operated with a constant workload throughout. The temperature curve is comparatively smooth and stable here, as the energy consumption and heat development are almost constant over the entire duration. In this scenario, all functional areas of the GPU are continuously active and mechanisms such as power gating are hardly used. The heat development remains stable, as the energy supply is even and the cooling works at a constant level. This is reflected in a linear temperature development in which the GPU efficiently utilizes its thermal limits without being additionally burdened by frequent fluctuations.
In gaming scenarios, on the other hand, the temperature curve is characterized by dynamic fluctuations. The reason for this lies in the strongly changing performance requirements caused by the different GPU calculations. Some frames require intensive calculations, for example for complex shaders or ray tracing scenes, while others can be processed with comparatively few resources. Technologies such as power gating ensure that unused GPU areas are selectively deactivated, which significantly reduces heat development during periods of low load. At the same time, separate power rails ensure the constant supply of critical components such as the memory, even if the GPU cores are temporarily turned down.
Another decisive factor is Accelerated Frequency Switching, which enables rapid adjustments to the clock frequency and voltage. This technology allows the GPU to react to load changes in microseconds and adjust its performance accordingly. This optimizes energy consumption, but at the cost of a more irregular temperature curve. Particularly in scenarios in which the GPU switches between low and high clock frequencies several times within a short period of time, visible temperature fluctuations occur. The heat development follows the dynamic changes in power consumption, which is a challenge for the cooling system as it has to constantly react to the varying thermal conditions. At 60 to 62 °C, the card is low enough in silent mode to achieve high boost steps even without OC.
The memory temperatures of the MSI GeForce RTX 5080 Vanguard SOC are also pleasingly low.
The cooling of the memory modules is supported by the large vapor chamber and the high-quality thermal pads. In silent mode, the lower fan speeds have an effect on the cooling performance, but this is compensated for by the overall lower waste heat. In Gaming Mode, on the other hand, the fan profile is more aggressive, which controls the higher waste heat from the VRAM. The efficiency of heat dissipation also depends on the quality of the thermal pads used (see material test).
Clock rates
The clock rates of the MSI GeForce RTX 5080 Vanguard SOC are pleasantly high. Under typical load, the boost clock rates range from around 2,840 to 2,870 MHz, depending on the thermal situation and the performance requirements of the game. This works much better here than on NVIDIA’s FE.
The increased clock frequency compared to the FE leads to a noticeable increase in performance in graphics-intensive applications, especially at high resolutions such as QHD and 4K. However, the higher clock rates also increase heat generation and fan speeds, which leads to louder operation. Energy consumption increases accordingly, as the GPU draws more power due to the higher clock rates.
Thermography
The thermographic images of the MSI GeForce RTX 5080 Vanguard SOC after 30 minutes each in idle, gaming and torture mode clearly show the thermal distribution and efficiency of the cooling design. The infrared measurements with the Optris PI 640 illustrate how the cooling works under different loads, with both hotspots and temperature ranges with even heat dissipation becoming visible in detail. The thermography shows that the MSI GeForce RTX 5080 Vanguard SOC has a very efficient cooling design that ensures stable temperatures both under moderate load in gaming and under extreme load in the Torture test.
The board exhibits slightly different temperatures in silent and performance gaming, but these barely differ by more than 3K.
The Torture test is hardly any different:
Backplate and pad problem
Finally, I’ll show you a superposition that shows the real hotspot on the back of the board. Unfortunately, MSI has stuck the pad directly under the GPU, i.e. in the wrong place because it is not optimal. But this can be changed and probably will be.
- 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
45 Antworten
Kommentar
Lade neue Kommentare
Veteran
Mitglied
Urgestein
1
Mitglied
Urgestein
1
Urgestein
Urgestein
Urgestein
Urgestein
Mitglied
Veteran
Urgestein
Urgestein
Urgestein
Urgestein
Urgestein
Mitglied
Alle Kommentare lesen unter igor´sLAB Community →