Load peaks and capping
This time I have created a gallery for each card to browse through, because otherwise there would be too many pictures. Nevertheless, we always have to take a look at the voltages or the product of voltage and current flow. I already wrote that I measured three different power supply connections here, even though all three connections meet again somehow on the graphics card board. What we can now see here as much clearer fluctuations and peaks is due to the power supply unit overvolting a little in places and therefore to the voltage and not the currents.
This is due to technical reasons, but is not a problem. However, we can also see that the few peaks at over 450 watts are not due to the current flowing (graphics card), but actually result from the power supply! This is also due to the topology and above all the input filters. I suspect that AMD works with a slightly higher switching frequency of the voltage regulators than NVIDIA, which could also explain the additional frequency waste. Incidentally, it hardly looks any different in the Torture test and the individual voltage peaks look rather uncool, incidentally for all cards.
Power supply recommendation
Now we come to the point that makes a complete mockery of the expected sensation of exploding power supplies. Even IF you hopelessly overpower the card, nobody really needs ATX 3.0 power supplies over 1000 watts, unless the CPU eats up more than 300 watts. This is really a pure job creation measure for the starving power supply industry and only satisfies the sick imagination of some standardization fetishists. You really have to put it that harshly. So you should always stay below 600 to 700 watts, even together with the CPU, if you count up to 10 ms. Because that’s what the power supply units still “see”
This is also how I formulate my power supply recommendation, which for both models is that you should be quite safe with a modern 650 watt power supply. If you want to overclock even further, you should plan for 50 watts more, which is especially true for the board partner cards.
be quiet! |
Straight Power 11 650 Watt Gold |
Sharkoon |
Silent Storm Cool Zero 650 Watt |
Corsair |
RM 650 Gold 650 Watt |
- 1 - Introduction and technical data
- 2 - Test system in igor'sLAB MIFCOM-PC
- 3 - Teardown: PCB and components
- 4 - Teardown: Cooler and material analysis
- 5 - Gaming-Performance in Full-HD (1920 x 1080)
- 6 - Gaming-Performance in WQHD (2560 x 1440)
- 7 - Details: power consumption and load balancing
- 8 - Transients and PSU recommendation
- 9 - Clock rates, temperatures and infrared analysis
- 10 - Noise level and fan curves
- 11 - Summary and conclusion
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