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

mixing FB RAM with ECC RAM


Post Reply New Thread Subscribe

 
Thread Tools
MACTUX

 
Member Since: Aug 06, 2004
Location: Belgium
Posts: 19
MACTUX is on a distinguished road
Mac Specs: Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870

MACTUX is offline
Hello!
As stated in the subject, I was wondering if I could use two type pf memory on my mac pro. Currently it's runnig with 8Gb ecc ram and i wish to add 16 Gb ram fully buffered.
Thx in advance,
JM
QUOTE Thanks
harryb2448

 
harryb2448's Avatar
 
Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 17,845
harryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond repute
Mac Specs: iMac i5 2.7GHz, 16GB memory, OS X.10

harryb2448 is offline
ECC only.

You have not specified which Mac Pro, but taking it as granted it is the one in your avatar, many of us have multiple Macs, here is the ECC memory. Buy only from OWC or Crucial:-


OWC 8566D3ECC4GB 4GB DDR3 ECC PC8500 1066MHz SDRAM... in stock at OWC

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!
QUOTE Thanks
MACTUX

 
Member Since: Aug 06, 2004
Location: Belgium
Posts: 19
MACTUX is on a distinguished road
Mac Specs: Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870

MACTUX is offline
Hello and the for your quick reply.

The question was if the Mac pro would be able to run properly when mixing two type of ddr2 ram.
For now it's running 8 gb of 800 MHz ECC ram. I d'like to add 16 gb of fully buffered ( clockspeed also 800 MHz).
What remain unclear to me it's the difference between fb and ecc ram.
Regards,
JM
QUOTE Thanks
Slydude

 
Slydude's Avatar
 
Member Since: Nov 15, 2009
Location: North Louisiana, USA
Posts: 6,595
Slydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant futureSlydude has a brilliant future
Mac Specs: 2.8 GHz MacBook Pro 10.8,3 8 GB mem, 2.66 GHz Mac Pro - Dead, iPhone 4

Slydude is offline
I have not had time to research this much yet but I bet it won't work. I had a 2006 Mac Pro that took the fully buffered ram. When I ordered ram I had to make sure I did not get anything else. I suspect the same is true for ECC ram. I'll do some digging and see what I find out.

Sylvester Roque Former Contributing Editor About This Particular Macintosh

"Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling
QUOTE Thanks
harryb2448

 
harryb2448's Avatar
 
Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 17,845
harryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond repute
Mac Specs: iMac i5 2.7GHz, 16GB memory, OS X.10

harryb2448 is offline
Sorry confused your model Mac Pro.


OWC 64FB1MPK02GB 2.0GB Mac Pro Memory Matched Pair... in stock at OWC

Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!
QUOTE Thanks
Lifeisabeach

 
Lifeisabeach's Avatar
 
Member Since: Sep 30, 2007
Location: Wilmington, NC
Posts: 7,002
Lifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond reputeLifeisabeach has a reputation beyond repute
Mac Specs: iMac i3 (mid-2010) + OS 10.9; TV 3; iPhone 5S; iPad 4

Lifeisabeach is offline
Never never never ever mix types of RAM! You are just begging for trouble. You can even have trouble mixing RAM from different manufacturers, even if specced the same.
QUOTE Thanks
MACTUX

 
Member Since: Aug 06, 2004
Location: Belgium
Posts: 19
MACTUX is on a distinguished road
Mac Specs: Mac Pro 2008 8 core -HDD Raid 0 -20Gb/Ram -ATI5870

MACTUX is offline
Hello all,
after all the FB Ram I ordered worked very well on my macpro ( it seems they were ecc too). The only diffference is about the CAS latency wich i cannot notice any negativ or positiv impact on the system.

Regards,
JM
QUOTE Thanks
lclev

 
lclev's Avatar
 
Member Since: Jul 24, 2013
Location: Lewisburg, Ohio
Posts: 362
lclev is a jewel in the roughlclev is a jewel in the rough
Mac Specs: MBP 15" Early 2011, i7, 16GB, 1TB HD; MB Air 13", Mid 2013, i5, 4GB, 256GB SSD

lclev is offline
Your Mac needs both. Error-correcting code memory (ECC) is a type of computer data storage that can detect and correct the most common kinds of internal data corruption. ECC memory is used to prevent data corruption.

FB Ram or Fully buffered has an advanced memory buffer (AMB) between the memory controller and the memory module. The memory controller actually writes to the AMB which in turn, acts like a sponge holding data for processing.

Since a lot of Mac Pro's are used for intensive work like video editing, photo work, etc, the advantage of FB DIMM's that are ECC is nice to have. They will cost more than there unbuffered, non-ecc cousins though.

And always, always, always match the memory. Never mix it. It might work....doubtful...but I wouldn't be surprised if the machine started acting weird.

Lisa
QUOTE Thanks

Post Reply New Thread Subscribe


« Wanting to connect Powermac 8 to 2012 Imac - Best way? | Mac Pro version for audio/video »
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
Which of these RAM upgrades should I buy for a Mac Pro 1,1? aaron321 Apple Desktops 4 05-21-2014 10:16 PM
Cheapest option for a 15" MBP with 16 GB of RAM. GhostlyGhost Apple Notebooks 3 05-05-2014 05:20 PM
Upgrading RAM in mid-2007 Macbook stonkpot Apple Notebooks 4 04-11-2014 05:45 AM
RAM question (don't know what to do : did my research) Buc021 Apple Notebooks 7 03-21-2014 04:06 AM
RAM vs different hard drive for Macbook Pro Buc021 Apple Notebooks 1 03-16-2014 07:35 AM

All times are GMT -4. The time now is 04:28 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?