|Nov 26, 2011, 09:31 PM||#1|
1 GB to 4 GB Macbook Upgrade Issues
I recently sought to upgrade my late 2008 2.1 GHz Intel Core Duo Macbook from 1 GB of memory to 4 GB. I'm using 2 new 2GB RAM chips from Best Buy (PNY DDR2). Installed them...Macbook wont boot up (light turns on, black screen, sound doesn't occur/nothing happens). However, keeping one of the old 512 MB ram chips in and one of the new 2 GB ram chips in will work fine with total memory equalling 2.5 GB and the computer is quite faster...just having the two new ones in wont work. But, I know this Macbook is capable of 4GB total.
I did a little research and found other people having similar problems with this issue, but really didn't find any definitive answer. Should I return the RAM and try a different brand? Any solutions?
Also, for the time being, if I keep one of the new 2 GB PNY ram chips in along with one of the old 512 MB chips, should this cause my macbook any problems with things like crashes, updates, firmware, etc? (mismatched ram chips).
|Nov 29, 2011, 10:07 AM||#2|
Your new chips have improper timings for your MacBook. When you have the old chip in it likely causes the new chip to decrease its speed to match the old chip's timing, thus allowing the computer to function. Macs tend to be picky about such things, so you need to be sure to buy RAM sticks that are certified for your Mac.
2012 2.6 gHz QC i7 Mac Mini; i5 2.3 gHz QC ITX Hackintosh HTPC; 2010 MacBook Pro i7; 2013 i7 MacBook Air; 2010 Mac Pro 12 Core/128 GB RAM; iPhone 6; 1st Mac=Centris 610
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