early 2008 MBP won't start after new RAM

KilGil27

macrumors regular
Original poster
Jul 29, 2006
136
0
Philadelphia
I installed this ram in my early 2008 15" 2.4 core 2 duo macbook pro today, and it won't start up if I have both sticks in at once. It works with one of the new sticks, and one of the old sticks, but then I only have 3 GB, not the 4 I paid for. Is this ram not compatible with this model or is something else wrong?
 

pragmatous

macrumors 65816
May 23, 2012
1,378
99
Probably defective RAM. Get it RMA'd.

I installed this ram in my early 2008 15" 2.4 core 2 duo macbook pro today, and it won't start up if I have both sticks in at once. It works with one of the new sticks, and one of the old sticks, but then I only have 3 GB, not the 4 I paid for. Is this ram not compatible with this model or is something else wrong?
 

pragmatous

macrumors 65816
May 23, 2012
1,378
99
Hmmm ...

Ahh I missed that part.

I've seen this in PC's quite often where one stick works but not both. I work in IT professionally and have been for 17 years. Usually updating the BIOS or UEFI resolves the issue. I'm not sure about macs. So yes it could be a compatibility issue.

Crucial has a very good memory detector app that will detect your system and recommend memory that is guaranteed to work. Crucial is a very reputable brand name. http://www.crucial.com/

newegg.com has a similar thing as well and will offer various brand names besides crucial.
http://www.newegg.com/MemoryFinder/

but would that only affect when both chips are in at once? because either one will work with the other old chip, just not together. curious...
 

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