New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

Imac mid 2011 confusing ram installation


Post Reply New Thread Subscribe

 
Thread Tools
zarathu

 
zarathu's Avatar
 
Member Since: Jan 04, 2010
Location: PA
Posts: 59
zarathu is on a distinguished road
Mac Specs: Apple since 1982, now: iMac 2.5 ghz, 500 HD, sandy bridge

zarathu is offline
I'm confused by the description in the apple support notice(http://support.apple.com/kb/HT1423):

"i5 and i7 Quad Core iMac computers come with both top memory slots populated. These computers will not start up if only a single DIMM is installed in any bottom slot; these computers should operate normally with a single DIMM installed in any top slot."

They are populated with 2-2gig chips. But if I want to add a 4 gig chip, the implication is that I cannot put it in one of theopen bottom slots. So to make sure that I don't have only one chip in the bottom slot, I would need to move one of the 2 gig chips that were pre installed, into a bottom slot to go along with the 4 gig chip I'm adding.

Is this correct??

"I've always wanted to own and control the primary technology in everything we do."
-- Steve Jobs, BusinessWeek Online, Oct. 12, 2004
QUOTE Thanks
chscag

 
chscag's Avatar
 
Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 39,128
chscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond repute
Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

chscag is offline
Your link is broken or doesn't work but I found the article anyway. My understanding is they're talking about using a single module in the bottom slot. In other words, nothing in the top slots. Then, the machine will refuse to boot. Unless I'm reading it wrong, it seems to me you can have both 2 GB modules in the top slot and one 4 GB in the bottom slot for a total of 8 GB. As long as the top slots are populated, you can have a single module in the bottom slot and the machine should boot OK.

Also, Apple says the Mid 2011 iMacs have a maximum capacity of 16 GB whereas OWC says you can actually put in 32 GB. That would be 4 x 8 GB modules. Very expensive though!
QUOTE Thanks
BrianLachoreVPI

 
BrianLachoreVPI's Avatar
 
Member Since: Feb 24, 2011
Location: Maryland
Posts: 3,742
BrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant future
Mac Specs: March 2011 15" MBP 2.3GHz i7 Quad Core 8GB Ram | Mid 2011 27" iMac 3.4 GHz i7 16 GB RAM 2 TB HDD

BrianLachoreVPI is offline
^^^^

What chscag said... In other words - populate from the top down where the 'top' in this case - are the slots closest to the back of the iMac. Oh - and don't use a screwdriver to push the RAM modules in like a certain forum member did.
QUOTE Thanks
zarathu

 
zarathu's Avatar
 
Member Since: Jan 04, 2010
Location: PA
Posts: 59
zarathu is on a distinguished road
Mac Specs: Apple since 1982, now: iMac 2.5 ghz, 500 HD, sandy bridge

zarathu is offline
Maybe I wasn't clear. I don't need instruction about how to put memory in. I've taken two powerbooks, and a mac book pro apart and replaced various parts and hard drives as well as putting in memory. That's not the issue.

There are four slots for the memory. My imac has the top two populated with two 2-gig Ram chips. The bottom slots are empty.

The apple support bulletin clearly states that it won't start up if I only put one chip in the two bottom slots. Of course I could buy another 4 gig chip, but not knowing this upfront I did not do so. Since I am now working on my old powerbook 800, as my macbook pro developed the black screen of death, I am chomping at the bit to get back into my new imac when it comes. But clearly from the bulletin, if I just put a 4 gig in ONE of the empty bottom slots, it won't start up.

So this means I have to move one of the two gig ram chips to the bottom slot, and put the 4 gig ram chim in the other bottom slot so that I have two 2- chips in the bottom, and one chip in the top(that is a 2 and a 4 at the bottom, and a 4 at the top.

Right?

"I've always wanted to own and control the primary technology in everything we do."
-- Steve Jobs, BusinessWeek Online, Oct. 12, 2004
QUOTE Thanks
BrianLachoreVPI

 
BrianLachoreVPI's Avatar
 
Member Since: Feb 24, 2011
Location: Maryland
Posts: 3,742
BrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant futureBrianLachoreVPI has a brilliant future
Mac Specs: March 2011 15" MBP 2.3GHz i7 Quad Core 8GB Ram | Mid 2011 27" iMac 3.4 GHz i7 16 GB RAM 2 TB HDD

BrianLachoreVPI is offline
Quote:
Originally Posted by zarathu View Post
Maybe I wasn't clear. I don't need instruction about how to put memory in. I've taken two powerbooks, and a mac book pro apart and replaced various parts and hard drives as well as putting in memory. That's not the issue.

There are four slots for the memory. My imac has the top two populated with two 2-gig Ram chips. The bottom slots are empty.

The apple support bulletin clearly states that it won't start up if I only put one chip in the two bottom slots. Of course I could buy another 4 gig chip, but not knowing this upfront I did not do so. Since I am now working on my old powerbook 800, as my macbook pro developed the black screen of death, I am chomping at the bit to get back into my new imac when it comes. But clearly from the bulletin, if I just put a 4 gig in ONE of the empty bottom slots, it won't start up.

So this means I have to move one of the two gig ram chips to the bottom slot, and put the 4 gig ram chim in the other bottom slot so that I have two 2- chips in the bottom, and one chip in the top(that is a 2 and a 4 at the bottom, and a 4 at the top.

Right?
Ok. First - the RAM installation mention was really tongue in cheek - hence the . Rereading that KB - scratch the previous terminology. I'll have to pull out my iMac manual - but that seems reverse terminology from what I recall - albeit - referring to the same slots, and now I'm questioning my own memory. I had 3 DIMMs in there for a period of time - and I'm fairly sure it was in fact - as you say - I had the single DIMM in the top slot - but it was a few months ago. At any rate - if you get it wrong -you'll know immediately - it'll chime at you - and then you can change it.
QUOTE Thanks
zarathu

 
zarathu's Avatar
 
Member Since: Jan 04, 2010
Location: PA
Posts: 59
zarathu is on a distinguished road
Mac Specs: Apple since 1982, now: iMac 2.5 ghz, 500 HD, sandy bridge

zarathu is offline
Apparently what needs to be done is this(since I only bought one 4 gig ram chip, and I'd like to get started with it):

Move the two initially supplied 2 gig ram chips from the top two slots to the bottom two slots. Put the new 4 gig ram chip in the one top slot.

I've ordered a second 4 gig ram chip to also go in the top slot when it comes in, but in the mean time this works. Also apparently, you have to have only the same size ram in both slots side by side/bottom-top, this means that you can have a total of 4, 8 , 12 or 16 gigs, but not 2, 6, 10, or 14 gigs(unless you were using 2- 1 gig chips in one of the bottom or top slots).

"I've always wanted to own and control the primary technology in everything we do."
-- Steve Jobs, BusinessWeek Online, Oct. 12, 2004
QUOTE Thanks
codda

 
Member Since: Apr 20, 2010
Posts: 472
codda is a jewel in the roughcodda is a jewel in the rough
Mac Specs: 21.5 iMac 3.06 ghz 12gb ram 500g HD iPad 2 16G

codda is offline
Wrong...^ Chscag nailed your answer earlier.
QUOTE Thanks
zarathu

 
zarathu's Avatar
 
Member Since: Jan 04, 2010
Location: PA
Posts: 59
zarathu is on a distinguished road
Mac Specs: Apple since 1982, now: iMac 2.5 ghz, 500 HD, sandy bridge

zarathu is offline
Well.... Chscag seems to have a view point in conflict with the actual Apple Support page. The support document says that you must have two chips in the bottom slot, and you can have one chip in the top slot. If you have no chips in the bottom slot, that is fine, but you cannot have only one chip in the bottom slot. New macs come with no chips in the bottom slot, only chips in the top slot. If you want to add two chip, not a problem. But if you only want to add one chip, then you must move the two chips that apple puts in.

After reading the support brief again several times its obvious. Now this is the the mid 2011 i5 and i7 imacs, only. Apparently it has to do with the 64 bit operation and the quad design of the cpu.

"I've always wanted to own and control the primary technology in everything we do."
-- Steve Jobs, BusinessWeek Online, Oct. 12, 2004
QUOTE Thanks

Post Reply New Thread Subscribe


« 27" LED Backlit Monitor for Mac Pro | planning to buy a mac pro computer and has some questions regarding it »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
OS X Lion Free Upgrade for Mid 2011 iMac Verlyn OS X - Operating System 10 07-23-2011 06:34 PM
iMac 27" Major Upgrade (Late 2009) boy2nr Apple Desktops 1 05-09-2011 02:38 PM
What to do with 4GB of RAM gilez Apple Notebooks 2 05-08-2011 04:04 PM
RAM on newer iMac work on older iMac? (StationOfPlay) Apple Desktops 5 08-07-2009 11:45 AM

All times are GMT -4. The time now is 05:33 AM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?