Bending at the socket even without cooler
Actually, it was more of a chance discovery, but (unfortunately) quite easy to reproduce. If you take a rather “cheap” Z690 board, in this case an ASRock Z690 Extreme, remove the socket cap, open the latch and insert the CPU, then it first looks like in our picture below.
By the way, the socket and the board of the motherboard were completely flat and without any curvature before inserting the CPU. But just inserting and tightening the bracket for the CPU caused many a motherboard to bend the socket even without any further assembly! This is neither intentional nor technically acceptable. But it is one of the possible (and certainly the most likely) causes of the causal chain of cooling problems.
The bulge extends over all sides, with the longitudinal edges being more affected. What’s almost worse, though, is that this bending is not uniform, but is slightly less pronounced on the I/O shield side than on the RAM side. On the memory side there is also the retaining clip and the receiver for the locking of the very tightly tensioned holder! The insertion of the CPU alone can result in bends that produce a gap of almost 2 mm!
Nevertheless, we also had cases where a higher quality socket from Lotes was installed and the CPU was also slightly curved. However, our own boards with Lotes socket show less camber in comparison, still. But again, it was measurable. But how are you supposed to compensate for something like that on the upside? Incidentally, system integrators also pointed out that the rather cheaper boards with thinner PCBs already had a U-shaped bulge around the socket before a CPU was even inserted.
But how can we (and especially the manufacturers of the coolers) remedy the situation? The solution, as is so often the case, is on the reverse side.
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