So I think I've always had pretty good luck with Crucial in the past, but seemingly not this time. I ordered 2 2gig sticks of ram for my new BlackBook. I used their memory advisor, and everything. They arrived today, and I couldn't get the machine to power on. I reseated the memory several times, switching the modules out, trying one at a time, etc, and couldn't get either to work. Replacing the original sticks got me up and running again. Do I have the right modules? The sticker says: 2GB 200 PIN DDR2 SODIMM 256MX64 Again, I have the 2.2 Black MacBook. I checked the invoice, and Crucial printed the information from the memory advisor, which checked out.