Load peaks and capping
I’ve created one gallery per card to browse through this time, because otherwise it would become 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 here at three different power supply connections, even if at the end on the board of the graphics card all three connections meet again somehow. What we can see here now as much clearer fluctuations and peaks is due to the partially a little bit overvolting power supply and thus the voltage and not the currents.
This is due to technical reasons, but it’s not a big deal. However, we can also see that the few peaks at over 400 watts are not caused by the flowing current (graphics card), but actually result from the power supply! This is also due to the topology and especially the input filters. I suspect that AMD works with a slightly higher switching frequency of the voltage regulators here than NVIDIA, which could also explain the additional frequency garbage. By the way, it hardly looks different in the torture test and the single voltage spikes look rather uncool, by the way on all cards.
Power supply recommendation
Now we come to the point, which leads the expected sensation of exploding power supplies completely ad absurdum. Even IF you hopelessly overpower the card, no one really needs ATX 3.0 power supplies over 1000 watts, unless the CPU eats more than 300 watts. This is really just a job creation measure for the struggling power supply industry and only satisfies the sick imagination of some standardization fetishists. You really have to put it so harshly. So you should always stay below 600 to 700 watts even together with the CPU, if you count up to 10 ms. Because it is what the power supplies still “see”
This is also the reason for my power supply recommendation, which for both models is that you should be able to get by with a modern 550 watt Gold or Platinum power supply (RX 7700XT) or 650 watt power supply (RX 7800XT). If you want to overclock, you should add another 50 watts, 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 overview of Navi32
- 2 - The cards from AMD, Sapphire and XFX at a glance
- 3 - Test system and the igor'sLAB MIFCOM-PC
- 4 - Teardown: PCB and components
- 5 - Teardown: Cooler and surprising material analysis
- 6 - Gaming-Performance in Full-HD (1920 x 1080)
- 7 - Detailed Metrics for Full-HD (1920 x 1080)
- 8 - Gaming-Performance in WQHD (2560 x 1440)
- 9 - Detailed Metrics for WQHD (2560 x 1440)
- 10 - Details: Power consumption and load balancing
- 11 - Load peaks, capping and PSU recommendation
- 12 - Temperatures, clock rates and infrared analysis
- 13 - Fan curves and operating noise
- 14 - Summary and conclusion
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