{"id":188228,"date":"2024-03-15T11:45:32","date_gmt":"2024-03-15T10:45:32","guid":{"rendered":"https:\/\/www.hwcooling.net\/?p=188228\/"},"modified":"2024-04-09T05:17:47","modified_gmt":"2024-04-09T03:17:47","slug":"minitest-cheap-psus-vs-graphics-cards-coils-whine","status":"publish","type":"post","link":"https:\/\/www.hwcooling.net\/en\/minitest-cheap-psus-vs-graphics-cards-coils-whine\/","title":{"rendered":"Minitest: Cheap PSUs vs. graphics cards coils whine"},"content":{"rendered":"

You’ve already read the extensive analysis of graphics card coil whine changes depending on the PSU used<\/a>. One last thing is missing for it to be complete. And that is to add the behavior of cheap PSUs with lower quality components. Otherwise, one could still speculate that across classes the situation could be significantly different. Could it? This is what we will focus on in the measurements with “80 Plus” PSUs, one of which is also already quite old.<\/p>\n

Does a cheap ATX PSU have a bigger impact on the coil whine of graphics cards than a more expensive one built on higher quality components? That’s what we’ll focus on in this article. It won’t be as many PSUs combined with different graphics cards as last time, but we don’t consider that necessary. For the reason that as long as the same graphics card was used, the dependency of the noise on the PSU used was always insignificant. We only tested the cheaper Fractal Design Anode<\/a> (you already know that one from this article<\/a>) and the old Zalman ZM-500GV with the MSI RTX 4070 Ti Super Ventus 3X<\/a>. Both PSUs belong to the lower class and are rated 80 Plus Bronze in terms of efficiency.<\/p>\n

The testing methodology<\/a> is the same as for the more efficient PSUs from the previous analysis<\/a>. This includes filtering out the external influence of interference from the power grid. For this, the PSUs are powered by pure sinusoidal voltage<\/a>.<\/p>\n

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Test results<\/h2>\n

The noise measured by the noise meter, represented by a single value (a mix of all sound frequencies), does not deviate from the average value of the others for either PSU. We can even say that they correspond to it. With 37.5 dBA (Zalman ZM-500GV) and 38.0 dBA (Fractal Design Anode (550 W)) respectively, the noise of the coils with cheap PSUs is average.<\/p>\n