iMac memory upgrade

Started Apr 5, 2012 | Discussions
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Jim Inverso Junior Member • Posts: 25
iMac memory upgrade

Do any iMac users have experience with memory upgrade. I just got the iMac 27-in 3.4Ghz with 4GB ram. (long time PC user). Tried to install Mushkin 16GB but would not boot. Reinstalled a few times with aid to tech support -- no luck. Reinstalled original 4GB and machine runs fine.

What 3rd party memory upgrade does anyone suggest. Also, can I use all 4 slots with 8GB sticks for a total of 32GB or is there a limit?

Thanks, Jim

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Howard Moftich Veteran Member • Posts: 7,705
Re: iMac memory upgrade

Most of the time, the 'preferred' vendors for compatible memory are crucial.com or macsales.com

Both have long history w/ Macs vs. some generic 'maybe it'll work' RAM.

Modern Macs can take to 32G

Steven VW New Member • Posts: 9
Re: iMac memory upgrade

I replaced the 4GB in my MacBook Pro by 16GB 'macmemory' from Corsair. No problem whatsoever. Paid €109 for it. I then put the 4GB that I took out of it in my iMac, and that's running fine too!

I thought my MacBook would only go to 16GB (Apple even states only 8GB in the specifications, but that is due to the fact that there were no 8GB modules available at the time of publishing)

dbbarron Contributing Member • Posts: 536
Re: iMac memory upgrade

I upgrade my 27" iMac from 4Gb to 16Gb with a kit from macsales.com. So did my dad. Both worked flawlessly. I have no affiliation with macsales.com other than as a customer.

db

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Peter Rongsted Senior Member • Posts: 1,641
Re: iMac memory upgrade

Howard Moftich wrote:

Most of the time, the 'preferred' vendors for compatible memory are crucial.com or macsales.com

crucial.com has a hardware scanner that will show exactly what modules will fit your iMac

Both have long history w/ Macs vs. some generic 'maybe it'll work' RAM.

And both are good vendors. Go with the one thats cheapest

Peter

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dccymbor New Member • Posts: 20
Re: iMac memory upgrade

Used this kit on two different macs (2009 models). Both run flawlessly

http://www.amazon.com/gp/product/B001PS9UKW/ref=wms_ohs_product

Gazphotos Regular Member • Posts: 140
Re: iMac memory upgrade

Order two of these which will give you four cards of 4GB each card for a total of 16GB. The guy at the Apple store told me about this and saved me a lot of money over buying the Apple memory upgrade.

http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=CEB1ACF0A5CA7304

johnny_r Regular Member • Posts: 171
Re: iMac memory upgrade

I purchased my iMac ram from new egg.

They are an exceptional company to deal with.

Regards,
John

Farmerjack Junior Member • Posts: 43
Re: iMac memory upgrade

Make sure the RAM is pushed all the way in. You need to push hard to insert it all the way. Its best if you lay a towel down and put the I-Mac upside down and against a wall so it does not move when you push the RAM in. Worth a try.

Bob

M Colyer Regular Member • Posts: 308
Re: iMac memory upgrade - worked a treat.

Just upgraded my 4Gig memory on my 21.5" 2010 iMac to 12Gig with Crucial.com memory. Worked a treat. Simply installed the new memory in the 2 primary slots and put the old memory in the secondary slots. No longer get the dramatic speed reduction associated with high RAM use when using iPhoto, LR etc. Still uses a lot of RAM but now have some spare RAM left over.

Can empty RAM periodically by using Terminal. Simply type in "purge" (without the commas), and press Enter. Not a lot of people know that!!

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Hughineugene Junior Member • Posts: 44
Re: iMac memory upgrade

I added memory for two iMacs and have to echo what was said previously about trying again with the memory you have. I almost gave up, and both times I had a tough time getting things to work until I pushed as hard as I could, heard an odd sound, then tried it, and that was what worked.
I made sure I had it all aligned..

iMacdaddy Junior Member • Posts: 33
Re: iMac memory upgrade

I second that. I just ( last week ) updated my iMac with the same RAM. Worked without a issue.

gaussian blur Veteran Member • Posts: 5,453
Re: iMac memory upgrade - worked a treat.

M Colyer wrote:

Can empty RAM periodically by using Terminal. Simply type in "purge" (without the commas), and press Enter. Not a lot of people know that!!

Which is is a good thing since doing that for no reason is a really bad idea. All it does is empty the disk cache, which means that anything that was in the cache will need to be reread from the disk, and that is going to be a whole lot slower.

Jen Yates Senior Member • Posts: 1,411
Re: iMac memory upgrade

What's the config of your 16GB kit? Can you install it as a 2x4GB to see if some of it's dead?

Check what you ordered, see if the spec is EXACTLY what you need in your iMac.

Check what they delivered, make sure it's what you ordered.

If you have no luck, then I'm a +1 for Crucial. I've been buying direct RAM from them for many a year and have never ever had an issue (I've even returned stuff ordered and not needed).

EricWN Senior Member • Posts: 1,849
Re: iMac memory upgrade

Farmerjack wrote:

Make sure the RAM is pushed all the way in. You need to push hard to insert it all the way. Its best if you lay a towel down and put the I-Mac upside down and against a wall so it does not move when you push the RAM in. Worth a try.

Bob

I think he knows how to upgrade RAM since the post says the original RAM was put back in the machine and works.

Hughineugene Junior Member • Posts: 44
Re: iMac memory upgrade

And I knew how to replace the original ram, but was lacking in confidence to retry. I was encouraged to do so on a Mac site, and am just relaying that advice, that worked well for me.

The original ram goes in and out like it was greased, but both times I put in iMac ram I really had to push like heck. Something that is normally not a good idea in electronics, but in both my previous Macs had to be done. It was almost as if the added spaces for ram were slightly different than for the original ram, or third party ram is a tiny bit wider.

Hugh

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