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Apple Computing Products:
macOS - Desktop Hardware
Why Apple recommends matched pair memory
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<blockquote data-quote="bigbadandugly" data-source="post: 201499"><p>True, but since this is a Mac group, presmably we don't have to worry about <em>marginal </em> products! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p></p><p></p><p></p><p>This is a very significant point of which I assumed was a given. When I was referencing matched pairs, I was implying matched <em>capacity</em>, assuming nobody would consider installing two modules operating at different speeds. Installing two modules of different speeds would have a dramatically negative impact on performance. The best case scenario, which it should do, would be if the memory controller operated both channels at the speed rating of the slower module to avoid race conditions. I wouldn't want to chance it, though, and would always recommend installing memory modules with the same speed rating, even if they are slower than the bus speed.</p></blockquote><p></p>
[QUOTE="bigbadandugly, post: 201499"] True, but since this is a Mac group, presmably we don't have to worry about [I]marginal [/I] products! ;) This is a very significant point of which I assumed was a given. When I was referencing matched pairs, I was implying matched [I]capacity[/I], assuming nobody would consider installing two modules operating at different speeds. Installing two modules of different speeds would have a dramatically negative impact on performance. The best case scenario, which it should do, would be if the memory controller operated both channels at the speed rating of the slower module to avoid race conditions. I wouldn't want to chance it, though, and would always recommend installing memory modules with the same speed rating, even if they are slower than the bus speed. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Why Apple recommends matched pair memory
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