slower memory module in iMac.. -
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Old Oct 31st, 2014, 02:44 PM   #1
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slower memory module in iMac..

Before selling a 20" (or maybe 21.5") iMac a couple of years ago I swapped the 2x 2gb modules from it with the 2 x 1Gb modules that were in my 2008 24" iMac, not realizing that the former were 667mGhz instead of the 800 mghz that the 24" iMac was using.
Never had much to complain about as far as speed although I do get quite a bit of beach-balling at times, and then when my son tried to do some video editing he said the Imac wasn't up to it and had to use another machine instead. Looking to upgrade the Imac a bit that's when I realized I had the slower ram modules in there.
I'm wondering how much faster my Mac would run with the 800Mghz modules compared to 667 mghz?
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Old Oct 31st, 2014, 07:15 PM   #2
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Considering how old the processor is, I doubt that faster RAM would make an appreciable difference. With most phones and cameras shooting HD (and 4k) now, there is no way a 6-year-old iMac will be able to keep up for video editing.
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Old Nov 1st, 2014, 12:13 PM   #3
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The RAM access will be about 20% faster, but the overall effect on performance will depend on what factors are slowing down the particular program.
Some programs are RAM - bound, come are disk I/O-bound, and some, like video editing, are often CPU-bound. In reality, all three come into play together at different levels, depending on the program and the tasks it is doing.

At a guess, you'd see about a 5% improvement in overall performance

Computer performance is like a garden hose with a number of kinks in it. Open one kink, and the flow will increase up to the level permitted by the next kink.
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