Summary and recommendation
Meanwhile, buildzoid has also released a video on the subject, nicely visualizing how different forms of CPU IHS and cooler can affect cooling performance. Because exactly these factors also became noticeable in our tests. While relatively flat water blocks clearly benefit from the washer mod and thus achieve 4-6 °C better temperatures, the AIO water cooler hardly shows a difference.
To summarize simply: the flatter the cooler or water block, the stronger the influence of the washer mod. Conversely, the more convex the cooler or water block, the weaker the influence of the washer mod. If you’re not sure, it’s relatively easy to try out the mod and do a before-and-after comparison yourself. There have also been reports about negative effects on the temperatures or the RAM OC, but only very sporadically so far. The majority of user reports in our forum, but also in other forums, describe improvements in core temperatures of 4-10 °C. In my opinion, such a potential improvement is at least worth trying out. And even if the result is not as desired, you can undo the mod relatively easily and safely.
And because it also came up in the discussions under the last post whether washers made of steel could be dangerous because they are conductive: The ILM is also made of steel, conductive and therefore conductive or not does not play a role here. Yes, a washer that may not be deburred could damage the board, but so could the screws if you put them in at an awkward angle and tighten them carelessly. So, as so often, the rule is: approach with caution and foresight, and then you’ll be on the safe side.
Finally, a word about washers: I have tried my way through the assortments of various online stores and unfortunately some M4 x “1 mm” products have tolerances of over 0.1 mm. So if you’re unlucky, you might end up with 1.1 mm on one side of the socket and 0.9 mm on the other, which in turn could affect the result. So if in doubt, it is best to measure the washers yourself with a caliper. Because if we Germans have to improve Intel’s retention mechanism, then we at least want to be accurate to a few hundreds. 😛
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