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 RAM downgrade - iMac won't start


Post Reply New Thread Subscribe

 
Thread Tools
mmatejj

 
Member Since: Jan 18, 2010
Posts: 3
mmatejj is on a distinguished road

mmatejj is offline
Hi ...

... two imac 27" computers ... first with 2x2GRAM ... second with 2x1GRAM ... I have switch the RAM plates from one computer to another ... so I upgraded one from 2 to 4GRAM ... and I downgraded other one from 4 to 2GRAM ...

... the upgraded one works perfect ...
... the downgraded one wont even start ... ???


... please help

thank you
QUOTE Thanks
Reel1

 
Reel1's Avatar
 
Member Since: Nov 29, 2006
Location: Barrie, Ontario, Canada
Posts: 606
Reel1 is a jewel in the roughReel1 is a jewel in the rough
Mac Specs: 2.16 GHz Intel Imac Core 2 Duo//MacBook 1.83 Core 2 Duo//G5 Power Mac

Reel1 is offline
different type of ram possibly
QUOTE Thanks
mmatejj

 
Member Since: Jan 18, 2010
Posts: 3
mmatejj is on a distinguished road

mmatejj is offline
but this type was on the upgraded one before ... and it all works well ...
QUOTE Thanks
Reel1

 
Reel1's Avatar
 
Member Since: Nov 29, 2006
Location: Barrie, Ontario, Canada
Posts: 606
Reel1 is a jewel in the roughReel1 is a jewel in the rough
Mac Specs: 2.16 GHz Intel Imac Core 2 Duo//MacBook 1.83 Core 2 Duo//G5 Power Mac

Reel1 is offline
maybe you have not seated it correctly or all the way
QUOTE Thanks
mmatejj

 
Member Since: Jan 18, 2010
Posts: 3
mmatejj is on a distinguished road

mmatejj is offline
I think it could be a problem in Mhz of RAM ... because one Imac is older than other ... we will see ...
QUOTE Thanks
Raz0rEdge

 
Raz0rEdge's Avatar
 
Member Since: Jul 17, 2009
Location: MA
Posts: 7,510
Raz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant futureRaz0rEdge has a brilliant future
Mac Specs: 27" i7 iMac, 24" iMac, 13" Macbook Air, iPhone 5 & 5S, iPod Nano 7th Gen, iPad 2 16GB WiFi, iPad 3

Raz0rEdge is offline
Does the upgraded iMac properly and fully report the 4GB of new memory? Usually RAM sticks need to be installed in matched pairs. So the downgraded iMac is most likely complaining about that..

Regards
QUOTE Thanks
Spike88

 
Member Since: Jan 07, 2010
Posts: 24
Spike88 is on a distinguished road

Spike88 is offline
Quote:
Originally Posted by Raz0rEdge View Post
Does the upgraded iMac properly and fully report the 4GB of new memory? Usually RAM sticks need to be installed in matched pairs. So the downgraded iMac is most likely complaining about that.. Regards
I agree with this as well. Being a certified Tech, we were told to NEVER mix memory simm brands and NEVER mix memory speeds either. Always keep the same (or nearest) speed as the factory memory simms. Keep them all the same - to avoid current and possible future problems. If wondering, I have mixed memory simms on my own machines. But, never done it on my customer's workstations.

Hope this helps as well...

.
QUOTE Thanks

Post Reply New Thread Subscribe


« iMac G5 - blank Screen and High Speed Fan | Upgrading My IMac »
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
Mac RAM (memory) JamminJonah Other Hardware and Peripherals 18 10-05-2009 02:31 AM
RAM on newer iMac work on older iMac? (StationOfPlay) Apple Desktops 5 08-07-2009 11:45 AM
RAM swap for new iMac BrenMyster Apple Desktops 4 01-12-2008 10:34 AM
RAM upgrade in iMac g5 laxkyle17 Apple Desktops 5 11-21-2007 02:17 AM
Imac G4 RAM Question. Mongamer Apple Desktops 5 11-02-2007 08:21 PM

All times are GMT -4. The time now is 07:55 PM.

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?