Load peaks(transients) and power supply recommendation
As I have already demonstrated in detail in my basic article “Der Kampf von Grafikkarte gegen Netzteil – Leistungsaufnahme und Lastspitzen entmystifiziert”, higher loads in the millisecond range do exist for short periods of time, which can lead to inexplicable shutdowns if the power supply units are not properly designed or equipped. The TBP (Typical Board Power) measured by the graphics card manufacturer or the reviewers is not really helpful for a stable system design. Peaks with intervals between 1 and 10 ms can lead to shutdowns in very fast-response protection circuits (OPP, OCP), especially in multi-rail power supplies, although the average power consumption is still within the norm.
For the card’s peaks, I would calculate with at least 450 watts proportionate to the system’s total power consumption on the secondary side to have enough reserves for the worst case scenario. If the 380 watt power limit is fully utilized, peaks of at least 500 watts would have to be considered in the relevant range.
Transients as detail graphics in different resolutions during gaming and stress testing
A short excerpt with higher resolution now shows us the even higher-resolution 20-ms measurements (10 μS intervals), as I run them automatically to determine the value. First, let’s start with gaming again:
during the stress test, the downregulation of the telemetry can be seen well in the small intervals.
- 1 - Introduction, Unboxing and Specs
- 2 - Test System and Methods
- 3 - Teardown: PCB Analysis, Components and Cooler
- 4 - Gaming Performance
- 5 - Gaming Efficiency and Power Draw
- 6 - Power Consumption in Detail and Standards
- 7 - Transients and PSU Recommendation
- 8 - Temperatures and Clock Rates
- 9 - Fan Curve, Fan Speed and "Noise" Analysis
- 10 - Summary and Conclusion
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