I have a mid-2010 Macbook (NOT Pro). Although Apple's "official" word that the max capacity is 4GB, I've read on multiple other sites that the mid-2010 Macbook can actually hold 8GB total (2X4GB). I've purchased 2 Mushkin PC3-8500 DDR3 1066 mHz 4GB sticks which is the type specified in my manual from Apple. The package even states it's "compatible" with Apple.
I've installed the two sticks and when I turn on my macbook the system makes a mid-length tone or beep, pauses a few seconds, then repeats the beep again. The screen doesn't do anything and remains black. This goes on until I shut it off.
I've tried every combination of RAM using my old 1GB sticks and my new 4GB sticks. They all work and they all work in each slot. My macbook will recognize them all and will show that I have 5GB installed. The only combination that won't work is if I use the two 4GB sticks together in which case I get those annoying tones/beeps that I mentioned.
At first I thought that perhaps the other sources were incorrect in the 8GB limit or were referring to the Pro models which I've noticed people often confuse with the white macbooks. If that was the case though I would assume that the macbook wouldn't be able to recognize the 4GB stick when it's inserted into the slot. Why can my macbook see and use both sticks but just not together?
Does anyone have a solution as to how I can get this to work? For what it's worth, I'm on Lion though I doubt that is part of the issue. I'd love to get this working with both 4GB sticks so that I don't have to make another 40 minute trip to return/exchange for different RAM. Like I said, both sticks work, just not together.