MSI GeForce RTX 5070 Ti Gaming Trio review – A good compromise between Ventus and Vanguard

1 - Einführung und Details zur Blackwell GB203-300-A1 GPU 2 - Testsystem und Equipment 3 - Teardown: Platine und Kühler 4 - Materialanalyse und Wärmeleitmaterialien 5 - Gaming Performance; Rastergrafik 6 - Gaming Performance: Supersampling, RT & FG 7 - Leistungsaufnahme, Lastspitzen und Netzteilempfehlung 8 - Kühler, Temperaturen, Thermografie, Geräuschentwicklung 9 - Zusammenfassung und Fazit

Total power consumption and compliance with standards in practice

The idle power consumption of 18 to 21 watts suggests further optimization potential for the drivers. Under load, the values are within the expected range, reaching up to 315 watts in demanding games, slightly above the TDP limit. In lower resolutions such as Full HD and QHD, the consumption is lower, which indicates a more efficient use of resources. DLSS and especially Multi-Frame Generation (MFG) further reduce energy consumption by reducing the render load through AI-supported optimizations without noticeably affecting image quality.

The PCIe slot (PEG) is designed for 5.5 amps at 12 volts in accordance with the PCI-SIG standard, which corresponds to a maximum power consumption of 66 watts. This specification ensures a stable power supply and protects against overloading. It also ensures compatibility between mainboards and graphics cards by preventing damage to conductor paths and connectors. High-performance graphics cards use external power connections to meet higher requirements. The card in question loads the PEG slot with just 0.8 amps (less than 15 watts), which underlines its efficient load distribution and low thermal load on the mainboard.

Detailed view of gaming in Ultra HD

In Cyberpunk 2077, the graphics card reaches up to 315 watts in UHD and maximum settings, due to the high computing load without AI-supported scaling. Although the 12V2X6 design is not exhausted, a stable power supply and a resilient power supply unit are required. The power consumption is measured in 20 ms intervals to capture fast load changes. The first graph shows the real-time consumption as a product of current and voltage and allows conclusions to be drawn about peak values and compliance with the PCIe specifications. The second graph illustrates the current distribution between the PEG slot and external connections and shows when the mainboard slot is unloaded.

The combination of both analyses provides a comprehensive view of the graphics card’s energy flows. While the power consumption evaluates the overall efficiency, the power distribution shows possible load peaks. This data is essential for developers and enthusiasts to precisely understand the power management of the card.

The next graphs analyze a single 20 ms interval with a resolution of 10 µs and show in detail the behavior of the power supply during short-term load changes. These are caused by sudden GPU requests, such as render spikes or frame changes. The first graph visualizes the power consumption in this extremely short period of time and reveals short-term peaks of up to 500 watts, which place high demands on the stability and response speed of the power supply unit.

The second graph shows the current flow through the supply cables and makes abrupt changes under dynamic loads visible. These measurements illustrate the importance of the ATX 3.1 standard, which requires a power reserve of 200% during short load peaks. As modern GPUs place extremely high demands in peak load situations, a sufficient power supply reserve is crucial in order to avoid voltage dips and ensure system stability.

Load behavior in the Torture test

Furmark is an extreme load test for graphics cards that generates an atypically constant maximum load, far above that which occurs in real applications or games. Through intensive calculations, both the shader and memory controllers are fully utilized, which leads to extreme thermal and electrical stress. This worst-case test checks the stability of the GPU and the power supply, whereby the power consumption can significantly exceed the specified TDP of 300 watts and reach peak values of up to almost 400 watts.

As Furmark generates a permanent maximum load, the test is not representative for everyday use, but it is extremely useful for uncovering weak points in the cooling or power supply.

The high-resolution measurements during a Furmark test provide precise insights into the behavior of the power supply and power consumption under extreme load. The continuous maximum load on the GPU results in constant thermal and electrical stress, which is analyzed at microsecond intervals. Particularly noticeable are short-term load peaks that far exceed the average power consumption and are caused by sudden changes in the load of individual GPU components.

These measurements are particularly relevant with regard to the ATX 3.1 standard, which requires power supply units to compensate for short-term peaks of up to 200% of the nominal load for up to 1 millisecond. The data shows that such peaks are not only theoretically possible, but actually occur and can severely stress the limits of power supply designs.

Summary of the load peaks and a power supply recommendation

A power supply unit with a rated output of 750 to 800 watts that meets the requirements of the ATX 3.1 standard is a suitable choice for reliably covering the power consumption values and load scenarios described. The maximum peak loads of the graphics card, which can reach up to 320 watts in extreme situations such as Furmark or very demanding games, make a high power reserve necessary. Together with the load of the rest of the system, such as the CPU, RAM and other components, this results in a requirement that can be up to around 500 to 550 watts in very short peak times.

An 800 watt power supply unit not only offers sufficient headroom, but also absorbs short-term load peaks, such as those required by the ATX 3.1 standard with up to 200% of the nominal load for one millisecond. This means that peaks of up to 1600 watts can be handled without stability problems. The dimensioning also ensures that the power supply operates in an efficient load range between 50 and 70 %, which optimizes energy efficiency and longevity. An 80 PLUS Platinum or Titanium certification also ensures low heat generation and high efficiency. Thanks to support for modern standards such as 12V2X6, the power supply is future-proof and offers long-term stability for upcoming high-performance graphics cards and hardware upgrades.