Why would one of my RAM bays be okay with a 512MB stick but not a 2GB?
February 11, 2011 9:10 AM Subscribe
I got some new RAM for my Macbook, but it's causing some really weird freezing issues.
posted by jenmess to Computers & Internet (10 answers total) 1 user marked this as a favorite
I recently tried upgrading the RAM in my Macbook from 2 512MB sticks to 2 2GB sticks, ordered from Crucial.com.
I upgraded, and everything was working fine for about an hour, when the computer froze. I rebooted, and about 20 minutes later the computer froze. I took out the RAM, reseated it, and tried to restart. The computer froze with the little spinny-wheel telling you that it's booting up OS X.
Then! We took out the 2GB sticks and replaced it with the 512MB sticks - everything was working fine. Put the 2GB sticks back in, it froze during bootup.
Put in one 2 GB stick and one 512MB stick and the computer froze during bootup. Switched the bays they were in and it's been working fine ever since, with 2.5GB total. Switched them back and yes, it froze again.
So, as far as I can tell, the problematic combination is a 2 GB stick + the left-most RAM bay (it's on the left when you're holding the computer horizontally and the battery is on upper half - just in case First Bay vs. Second Bay would matter for some reason). No matter which 2GB stick you put in there, it freezes on bootup.
To further complicate things, I never looked at the RAM listing when it was first working to make sure it was reading a full 4 GB - maybe I just hadn't seated the 2 GB stick in the 'broken' bay, so it never worked in the first place.
So yeah, my Macbook is out of warranty and it's a pretty weird situation. Before I take it to the Genius Bar and have them offer a $1000 fix, any ideas would be appreciated.