High-resolution measurements in the ATX 3.0 range under 1 ms
But because I still want to know exactly, I’ll break it down even further and take 20 ms as the total runtime. The intervals of 10 microseconds can still be reasonably measured and we can also see the voltage here as a gray curve, the average value of which is well above 12 volts, but which nevertheless still alternates somewhat within the permissible range. I have already written something about ATX 3.0 and the voltages.
If you then convert this to power consumption in watts, you get this picture:
I did the whole thing again for the Torture Loop, where we can admire the regular drops. First of all, the currents again, but with lots of strange, sporadically recurring drops on every climb. This looks like a violent hiccup before the power is really throttled back shortly afterwards. The super variant has to brake a little more frequently, logically.
And then the total wattage again:
Power supply recommendation
Now we come to the point that makes a complete mockery of the expected sensation of exploding power supplies. You should therefore always stay well below 650 watts, even together with the CPU, if you count up to 10 ms. Because that is what the power supply units can still “see”. With a little reserve, 750 watts is certainly enough.
With this in mind, my power supply recommendation for the GeForce RTX 4080 Super is that you should be quite safe with a modern 750 watt gold or platinum power supply. If you want to overclock, you don’t really need to plan much more, which is especially true for the board partner cards.
- 1 - Introduction, technical data and technology
- 2 - Unboxing and technical details of both cards
- 3 - Test system and measuring equipment
- 4 - Teardown: PCB and components
- 5 - Teardown: Cooler and fans
- 6 - Material analysis: NVIDIA RTX 4080 Super FE 16GB
- 7 - Material analysis: MSI RTX 4080 Super Expert 16GB
- 8 - Gaming-Performance WQHD (2560 x 1440)
- 9 - Gaming Performance Ultra-HD (3840 x 2160)
- 10 - Gaming Performance DLSS vs. FSR
- 11 - Gaming performance with Frame Generation
- 12 - Latencies and lags
- 13 - Workstation graphics and rendering
- 14 - Details: Power consumption and load balancing
- 15 - Load peaks, capping and power supply recommendation
- 16 - Temperatures, clock rates and infrared analysis
- 17 - Fan curves, noise level and audio samples
- 18 - Summary and conclusion
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