Again, I measured both cards, but only include the GeForce RTX 3090 in the measurement because the idle power consumption is a bit higher and jumpier. Sure these are just marginalia, but one should already be fair. The measurements are done over 12 seconds with 2 ms intervals each, which is the lower limit of what I still consider relevant for the protection circuit of a power supply, even if it is actually nonsense and much too short. But there are such nervous and anxious voltage providers quite, unfortunately.
I also explain the diagrams briefly for better understanding. The yellow curve is the total load on all 12 volt rails including the graphics card, the red curve represents the CPU on the EPS connector, the blue curve represents the graphics cards (PCIe and PEG) and the green curve represents the motherboard base noise (12 volt, 5 volt and 3.3 volt including graphics card)
Intel Default (125 Watt / 251 Watt)
We see here for the CPU an average load of 244 watts in the measured 12 seconds (PL2 is active). When Tau is reached (often in less than 56 seconds), it is still 127 watts. So it fits. The highest peak value for all 12 volt rails is a little over 400 watts, the value for the rail with the EPS and the 12 volt motherboard supply is about 280 watts. So up to this point, everything is in the green.
If you take the CPU out of the equation, then you can see that very high load peaks of up to 340 watts can develop, which you certainly wouldn’t expect. For comparison, a similarly potent Ryzen 9 5900X is a real easter lamb to stroke here with about 225 watts on spikes. You can also see very clearly the large fluctuations including the many dips down to almost 10 watts, just not to exceed the target value in total. This is real load peak hardcore.
Now I’m going to take a 20-ms interval and break it down. Here we measure exemplarily between 305 and 99 watts, whereby the reductions are mostly in the 1 to 2 ms range.
Again, I have the whole thing just for the CPU alone:
“Tower Air Cooler with 288 Watt Limit
Now we’ll add a little more and leave the limit at 288 watts. The average load for the CPU is now 290 watts, but this can only be maintained because it is significantly reduced in the meantime. Without this brake you would already be well over 300 watts!
All this once again for the CPU alone:
The detail shot shows how the power consumption is sporadically braked in so that the Rocket Lake S doesn’t burn up. Otherwise there would be nothing with the (almost kept) 288 Watt limit on the display, because calculated on pure time intervals you are usually well above 300 Watt. These are values that you will never, ever achieve with a Ryzen, even with the most malicious intent, using normal on-board resources.
And because it was so nice, the whole thing again as a solo performance. This is what Intel’s 288 watts look like in reality.
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