We were not able to measure power consumption at the 8-pin connectors due to physical constraints, the only thing we saw was CPU package power reported as 215W, while its most definitely much higher as that's under its TDP. We think if we did measure it physically it would be above 255W, closer to 300W or 320W. ASUS said this on default power settings, "The default power setting enforces strictly POR limits of the processor" and they aren't one of the vendors who unlocks power default on Z390 boards, at least not if you don't touch anything like XMP or MCE.
Here are some power numbers (not from Intel), 4GHz with AVX Prime 95 Small FFTs will pull 680W, 4.2GHz Prime 95 Small FFTs non-AVX will pull 568W, and 4.5GHz CINEBENCH will draw 560W. Those are all core overclocks. That's a lot, especially at AVX in Prime95. Remember us telling you that the Asetek cooler was swapped for the EKWB for overclocking? Did you know that new Asetek cooler is rated for 500W, which means the EKWB one must be rated even higher.
Here is where things got interesting. The CPU has no STIM (solder thermal interface), and instead uses paste, but it's able to overclock above what we expected. We went with 1.2v on the VCore, but didn't touch mesh or mesh frequency, we set XMP, LLC to level 6, increased all external and internal power limits (even though ASUS said that's done automatically when setting all core OC), and set VCCIN to 2.05v so that performance wasn't hindered.
Our temperatures look fine, but we did catch one or two cores throttling down to 37x a few times, which means some internal power limiting is going on. However, we hit 4.6GHz, at 4.5Ghz we didn't have that throttling. Keep in mind, that while Handbrake isn't a really touch benchmark, it is engaging internal AVX units.
We decided for fun to see how high the CPU could go without totally throttling but completing CINEBENCH. We also wanted to see if performance would scale up with a non-AVX benchmark, and CINEBENCH is pretty good at that. Performance did scale, and only one core hit a thermal throttle, and that's all the way up to 4.8GHz. We did have to increase VCore to 1.25v to achieve this, while 4.7GHZ was cool with 1.2v, 4.8GHz required an extra 50mv.
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