Bank 0, Bank 1 works, but not together??

ncshawng

macrumors member
Original poster
Oct 16, 2007
41
1
Harrisburg, NC
I ordered a pair of DDR2 2GB PC5400 Dual speed 667 MHz OCZ from Outpost (Fry's) that arrived today.

From System Profiler, here is the MBP I have:

Model Name: MacBook Pro 15"
Model Identifier: MacBookPro1,1
Processor Name: Intel Core Duo
Processor Speed: 2.16 GHz

I can put a 2GB module into either Bank 0 or Bank 1 and all works OK (it shows the system as having 2 GB of RAM available).

However, when I install RAM modules into both banks, it does not appear to boot (power comes on, but the screen never lights up), and thus I never get OS X booted. No matter which modules I use (both 2GB and the 1 GB that was previously installed), it never seems to boot with both banks full.

Any clues about what is happening here??

Thanks,

Shawn
 

cogsinister

macrumors 6502a
Aug 24, 2006
541
0
Fredericton NB Canada
I ordered a pair of DDR2 2GB PC5400 Dual speed 667 MHz OCZ from Outpost (Fry's) that arrived today.

From System Profiler, here is the MBP I have:

Model Name: MacBook Pro 15"
Model Identifier: MacBookPro1,1
Processor Name: Intel Core Duo
Processor Speed: 2.16 GHz

I can put a 2GB module into either Bank 0 or Bank 1 and all works OK (it shows the system as having 2 GB of RAM available).

However, when I install RAM modules into both banks, it does not appear to boot (power comes on, but the screen never lights up), and thus I never get OS X booted. No matter which modules I use (both 2GB and the 1 GB that was previously installed), it never seems to boot with both banks full.

Any clues about what is happening here??

Thanks,

Shawn
Possable Logic board fault ?
 

ncshawng

macrumors member
Original poster
Oct 16, 2007
41
1
Harrisburg, NC
I don't think that PC5300 (667 MHz FSB) and PC5400 (675 MHz will make a difference. I've been told that both types work fine in a MBP.
 

CanadaRAM

macrumors G5
Hockeypuck is right, it's a Core Duo. It will never work with 2 x 2 Gb. Shoulda either done the research first, or bought from a Mac-aware seller.

There is NO difference between PC2-5300 and PC2-5400, those are marketing terms and have nothing to do with the standard of the RAM (DDR2-667 MHz)
 

ncshawng

macrumors member
Original poster
Oct 16, 2007
41
1
Harrisburg, NC
Thanks for the info -- I did research this forum, but never saw this clearly addressed for my MBP.

All is nor lost -- I have an iMac coming next week, and should be able to use the other module in it.

Thanks again!
 

David Bell

macrumors newbie
Oct 29, 2007
1
0
Similar Problem

Hi

I have same MacBook Pro and similar problem.

My MacBook Pro 15" Core Duo 2.16 GHz has 1GB of DDR2 SDRAM 667MHz in Bank 1 and everything is fine.

Took the machine to an Apple retailer last week to have another 1GB inserted into Bank 0 (I know that 2GB is the limit) and the machine won't boot up. Retailer moved the original 1GB from Bank 1 to Bank 0 (leaving Bank 1 empty) and that caused the same problem. Retailer concludes that Bank 0 is faulty and needs repair.

My machine is just out of warranty, so I am trying to find enough supporting evidence to ask for a free repair (given that there was no way I could test Bank 0 during the warranty period). Any ideas ?
 

cyclotron451

macrumors regular
Mar 16, 2005
220
1
Europe
Thanks for the info -- I did research this forum, but never saw this clearly addressed for my MBP.

All is nor lost -- I have an iMac coming next week, and should be able to use the other module in it.

Thanks again!
interesting test, I have the same Macbook and was wondering about the 2 x 2GB. It does seem however that having two x 1GB so-dimms might give a few percent speed-up, compared to running with a single ram stick. Your imac would probably love the matched pair of 2GB's then you could put the iMac stock mem back in your MBP1,1
 
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