Is there really THE ideal coil?
Yes and no. I have already written several times that an inappropriate or tightly calculated distribution and utilization of the switching regulators always leads to operating noise if the flowing currents are too high. You can’t just manually replace one coil with another. But is that even possible? The inductance is not everything, the internal resistance, the coil core including material, the resonant frequency and the encapsulation also count here. The so-called “Magic” coils from Lenovo or similar replicas are very good mid-range and are popular.
The legend that high coils would be quieter per se cannot be proven statistically, nor can it be proven practically. Sometimes the opposite is even the case, when completely unencapsulated coils are used, as here on a HOF from Galax. They buzz and whine like a band of cicadas at the fair. But I always give such coils a wide berth privately anyway.
Of course, there are also manufacturers like Asus or MSI that label themselves coils and promote them with aggressive marketing-speak. These are certainly not low-cost solutions, but they can’t work miracles either. In the end, Mr. Lorentz always wins anyway.
Summary and conclusion
Today we learned several things. Of course, there are the switching regulators (voltage converters) and how they work, which are distributed over several phases and supply the GPU with power. We now also know how to equip these switching regulators appropriately and that the components naturally also depend on the switching frequency used, which cannot be increased infinitely. In addition, we have learned about the Lorentz force and now also know that actually every coil buzzes. Just sometimes quieter and sometimes louder. So movement is always involved.
But there was some additional information for our water cooling faction and the glue activists who would prefer to concrete coil housings Mafia-like. This can also be done, but only if the circumstances make it advisable. To avoid tinnitus attacks, there are frame limiters & co. or already the information gathering before a purchase of product A, B or C. Cheap graphics cards are certainly not only statistically usually louder than the top models, but this is also due to the smaller number of control circuits.
And we now also know that a control loop is not a phase, and that with the current cards you can do quite well with up to three switching controllers per phase. We must accuse marketing of deliberately lying to the customer when selling switching regulators operating in parallel as single phases. You don’t do that! And what else? You are now on page five and hopefully a bit wiser. If not, so be it. You can’t have everything. Just lucky that the card does not beep. Because the next world coil beep day is sure to come soon!
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