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Apple Computing Products:
macOS - Desktop Hardware
iMac 21.5" 3.33mhz - Memory Upgrade "Issue"
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<blockquote data-quote="flypaper" data-source="post: 1231428" data-attributes="member: 200811"><p>I just tried upgrading my imac memory from (4) 2gb modules to (4) 4gb modules. The new ones are Samsung 4gb PC3-10600S DDR3-1333Mhz 204-pin SO-DIMM. iMac is 3.33 core duo.</p><p></p><p>The old ones were 2 different manufactures of memory in the Apple-supplied memory: 2gb PC3-8500 DDR3 1066Mhz....</p><p></p><p>According to the Apple support site (and a phone call to apple support) the 1333 memory should work, so that's what I bought.</p><p></p><p>When I install the cards and turn on the machine, within about 1 second I get a beep that occurs every 4-5 seconds. I let it go and it did it more than 9 times in a row. I had looked to see if this was a diagnostic signal, but it doesn't seem to match up.</p><p></p><p>I took the new memory out; reseated it to make sure it was tight; restarted - same beep. </p><p></p><p>I reinserted my old memory, and am back up and running.</p><p></p><p>-------</p><p>Can anyone comment on this issue? I spent about 90 minutes looking around on the web and could not reach a conclusion.</p><p></p><p>Seems possible that:</p><p>a) One of the memory cards is bad</p><p>b) the 10600 / 1333 is not really compatible with the HW despite 3 sources that say it should be</p><p>c) I'm lucky smoke didn't come out of my computer</p><p></p><p>Thanks for any insight or help you can give~!</p><p></p><p>Flypaper</p></blockquote><p></p>
[QUOTE="flypaper, post: 1231428, member: 200811"] I just tried upgrading my imac memory from (4) 2gb modules to (4) 4gb modules. The new ones are Samsung 4gb PC3-10600S DDR3-1333Mhz 204-pin SO-DIMM. iMac is 3.33 core duo. The old ones were 2 different manufactures of memory in the Apple-supplied memory: 2gb PC3-8500 DDR3 1066Mhz.... According to the Apple support site (and a phone call to apple support) the 1333 memory should work, so that's what I bought. When I install the cards and turn on the machine, within about 1 second I get a beep that occurs every 4-5 seconds. I let it go and it did it more than 9 times in a row. I had looked to see if this was a diagnostic signal, but it doesn't seem to match up. I took the new memory out; reseated it to make sure it was tight; restarted - same beep. I reinserted my old memory, and am back up and running. ------- Can anyone comment on this issue? I spent about 90 minutes looking around on the web and could not reach a conclusion. Seems possible that: a) One of the memory cards is bad b) the 10600 / 1333 is not really compatible with the HW despite 3 sources that say it should be c) I'm lucky smoke didn't come out of my computer Thanks for any insight or help you can give~! Flypaper [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac 21.5" 3.33mhz - Memory Upgrade "Issue"
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