Mac OS X (10.6.6)
I just ran into a big issue by trying to use 1066MHz instead of the recommended 1333MHz in my Macbook PRO i7 (Version 10.7.3). I got issued the wrong memory upgrade for my Mac and just discovered today that 1066MHz doesn't work on a 1333MHz computer. Things seemed to be working fine, until I tried shutting the lid to my computer to hibernate it. Whenever I'd come back later to open it up, the screen wouldn't come on, but the computer would still be running. The sleep mode would not work properly until I put my old 4GB memory back in...now it works great. I'm definately going to get the correct 1333MHz Memory for my computer and not the 1066MHz memory.
I just wanted to let you know that I have a brand new Macbook pro and I removed the 4 Gb @ 1333 Mhz and installed 8Gb at 1066 Mhz and it works perfecly... no performance effect at all, both running benchmarks, games or computing software.
Also no technical problems, I guess that Songbird has some corrupt modules
Could i7 apply 16G ram 1666?
Here's an update...I just installed my new 8GB memory (1333 Mhz) in my new Macbook Pro and it works beautifully. I no longer have sleepmode problems and can open and close my computer without any problems. Everything works like it should, unlike it did when I tried running 1066 Mhz on my Mac. I'd definately recommend sticking with the correct memory. It may seem to work fine for awhile, but you may end up having problems later.
More then a year since I put those 1066's everything is ok.
Although the slower memory may work, it is not guaranteed to do so. The components are sorted by speed, and you may have some problems.
You are right not something people should do, I got stuck with the ram because I could not return them. I had the Macbook Pro without Thunderbolt and month later TBOLT came out so I did a return but was stuck with the ram I bought online.
2011 Macbook Pro 1333mhz Ram vs 1066mhz whats the difference?
